Yuki Nekoyama found the fourth note tucked in her favorite book, and this time she wanted to catch the person who wrote it. The library castle stayed open late, and she always came for the same shelf of short stories. Someone had been reading them too. Each night a new note waited between the pages, in neat handwriting, with a tiny cat sketched in the corner. "You're doing great," the last one said. "Don't forget to take a break." Yuki had never told anyone she loved these books. Whoever wrote the notes knew her without her saying a word. The problem was simple. She never saw them arrive. She would open the book, read the note, and set it down. By morning the book was reshelved, and the writer was gone. Yuki hated attention, but she wanted this person's name. She just could not stand in the open and wait. Everyone would look at her. So she built a hiding spot. In the far corner she stacked pillows and books until it looked like a cozy reading nook. From there she could watch the short story shelf without being seen. She brought a notebook and wrote down every person who came near the books that week. By Friday she had six names. A cheerleader with a high, swinging ponytail. The head of athletics, measuring the aisle like he was planning a swim lane. A blond girl in yellow, flipping pages fast. A boy with a bright star crest. And two seniors in purple and yellow plaid, both with raven crests. Six suspects, and no way to know which one. Yuki pressed her pen into the paper. She could not follow all of them. She had to narrow the list tonight. Then the librarian passed her nook, holding a book against her chest, glasses low on her nose. She stopped. "You've been here every night," she said quietly. "Watching that shelf." Yuki froze. "I'm just reading." The librarian smiled. She set a slip of paper on the pillow beside Yuki. "The notes you keep finding. Whoever leaves them checks out that book after you return it. Their name is on the record. But I can't share it. That's the rule." She tapped the slip. "I can tell you when they come. He returns it right at closing." Yuki's chest went tight. He. One word cut her list of six in half. It is a him. She thought.

Four suspects left. All boys. All seen near the short story shelf at closing. Yuki knew one thing for certain: the note-writer loved these books the way she did. If she could hear any of them talk about reading, she would know. But asking meant speaking first. That was the wall she couldn't climb. Morning came, and she made a plan she hated. She would stake out each boy and listen. No talking. Just listen. She started at the newspaper stand, where fresh copies sat in neat rows. Kai Ravencroft leaned against it, purple plaid loud in the grey hall. A crowd pressed around him. He noticed her and smiled. He was her friend, though the noise around him always pushed her back. She waited for a word about books. He talked about a valerian blend that had knocked him out cold in class. Nothing. She moved to the water fountain. Hiro Takeda stood there with his clipboard, green stripes down his sweatpants. He argued with a teammate about lane widths for a swim team the school hadn't approved yet. Panda crest, loud voice, not one word about stories. Yuki drifted away. The quad was her last stop. Akira Hoshino sat on a bench, yellow star bright on his white blazer. He frowned at his phone, then set it down. "Lindsey picks pens by some system," he said to no one. "I never cracked it." Math. Pens. A missing girl. Books never came up. By afternoon Yuki had heard nothing. Three boys, three dead ends. Her plan had failed completely. She couldn't wait around forever, and eavesdropping told her nothing without a book on the table. She gave up for the day. She headed to science class. Her chest still ached from the silence she'd kept all day. She passed Akira on the way, and this time he looked up. "You dropped this," he said. He held out her notebook. It must have slipped from her bag. The page lay open to her list of suspects. Yuki froze. Her throat locked. The old fear rose, the memory of her notes read aloud to a whole room. But Akira didn't read it out. He just handed it back. "I don't read other people's notes," he said. "Bad habit to have." Something in his plain voice loosened her. Before she could stop herself, she spoke. "Do you like the short stories? On the shelf in the library?" Her own voice shocked her. She had spoken first. Akira shook his head. "Never touched them. I return math books there at closing. That's it." He shrugged. "Ask the one who actually reads. Not me." Yuki's heart dropped and lifted at once. She had failed to catch the writer today. But she had spoken. And Akira just told her something no watching could: he wasn't the one. Three boys left. And now she knew she could ask.

Three boys left. And now Yuki could ask. That thought carried her through the next morning. She checked out her favorite book again from the library castle, tucked it in her bag, and walked to her locker. The row of lockers stood covered in posters and stickers, mirrors catching the hall light. She wanted to open the book, but her hands shook. So she cracked her locker door wide and hid behind it. Inside the book, a note waited. New ink. She read it fast. "I always notice you in the library, Yuki. I hope these books bring you as much comfort as they do to me. Your classmate." A tiny cat sketch sat in the margin, holding a book. A speech bubble said, "Ganbatte, Yuki!" Her face went hot. The writer knew her name now. He had drawn something just for her. "What are you hiding back there?" Raven Nightshade leaned around the locker door. Her best friend since forever, all black hair and purple plaid, a raven crest on her blazer. Raven talked to plants in the apothecary garden and read her way through them, but with Yuki she was blunt and warm. She spotted the note before Yuki could shut the book. "Another one. I want every detail. Ramen. After class. No skipping." Yuki nodded. She couldn't have said no if she tried. After class they crowded the cat-themed ramen stand. Steam rose off the bowls. Sakura Takanawi worked the counter, pink hair bright, a grey kitten in a floral sweater curled on her shoulder. Teacup's bell chimed when she stretched. Sakura was in the Cozy Readers Club too, so she leaned close the second she heard the word "note." "Okay," Raven said. She wiped a clean spot on the counter and wrote three names in condensation. "Suspects. Kai. Hiro. Akira." "Akira's out," Yuki said. Her voice came steadier than yesterday. "He returns math books at closing. He never touches the short stories." Raven dragged a line through Akira's name. "Two left, then." Sakura set down a bowl of tonkotsu with an extra soft egg. She hadn't even been asked. Yuki looked up, surprised. "Bad-day face," Sakura said gently. "But this isn't bad. This is good, right?" Teacup mewed as if she agreed. Yuki showed them the note. The cat drawing made Sakura gasp. "He draws," Sakura said. "Kai's in apothecary, all he talks about is herbs. But Hiro?" She frowned. "Hiro carries a clipboard, not a sketchbook." Raven tapped the two wet names. "Neither one fits a boy who sketches cats. Maybe your suspects are wrong." Yuki stared at the little drawing. Sakura was right. Kai talked plants. Hiro talked lane widths. Neither had ever mentioned reading, or drawing, at all. Her three suspects had shrunk to two, and now both looked wrong. She set the book down. "Then I've been watching the wrong shelf," she said. "I need to find who draws."

The next day, Yuki walked to the library castle with Raven at her side. She wanted to find the artist, not watch the wrong boys. But first she needed her book. She stopped at the tall catalog shelf, ran her finger along the spines, and pulled her favorite one free. It felt heavier than she remembered. Raven leaned close. "Open it. Don't hide this time." Yuki set the book on the librarian's dark wood desk to check it out. The librarian looked up from a book of her own, glasses catching the lamp. She stamped Yuki's card and slid the book back with a small, knowing smile. Then she moved past them toward the shelves, still smiling, saying nothing. Yuki opened to the middle. This time there was no short note. A whole poem waited, written in careful ink. Around it, tiny cat sketches filled the margins, one cat reading, one cat blushing, one holding a candle. The poem said her name. It said that when Yuki turned these pages, the light in the quiet room seemed to bend toward her. Her cheeks went hot. She pressed the book to her chest. "That's a poem," Raven whispered. "He wrote you a poem." Yuki turned back to the desk. The librarian had returned to her spot, pen moving. "Excuse me," Yuki said, softer than she meant to. "The person who checked this out before me. Do you know who it was?" The librarian's smile stayed warm. She closed her own book on one finger. "I know exactly who," she said. "But I can't tell you. Checkout records are private. You understand." Yuki's stomach dropped. So close. The one person who knew the answer sat right in front of her, and she wouldn't say. Yuki nodded and stepped back. Her hope shrank, but it didn't die. The librarian knew. That meant the writer was real, and near. Raven pulled Yuki to the cozy reading corner and dropped onto a pillow. She stacked two books beside her without thinking. "Fine. She won't tell us. So we go around her." Raven tapped the cat drawings. "Look at these. Clean lines. Real shading. This isn't a doodle. Whoever draws like this practices somewhere." Yuki traced the little reading cat with her finger. "The art students." "The artists' hallway," Raven said. "Where they hang their work. If your boy sketches, his style is on a wall there." She grinned, sharp and pleased. "We match the cats to the artist." Yuki looked at the poem again, then at Raven. For the first time she wasn't just waiting for a note to appear. She had a place to go and a way to look. "Tomorrow," she said. "After class. The artists' hallway." Raven bumped her shoulder. "Now you're hunting." Yuki tucked the book into her bag. The librarian's secret still stood between her and a name. But tomorrow she would go looking for the hand that drew those cats.

After class, Yuki met Raven at the castle gate. Stone arches curved above them, cold and grand. Yuki carried the library book in her bag, the cat poem tucked inside. "The artists' hallway is past here," Raven said, and led the way. Yuki followed, thumb pressed to the strap of her bag. If she matched the cats on the walls to the cats in her book, she would finally have a name. The hallway walls held rows of student art. Yuki slowed. Three cat canvases hung close together. One showed a black cat ringed with purple stars. One had a striped tabby with sharp eyes. The last was a round grey kitten with big eyes. Yuki pulled her book out and held the margin sketches beside each one. Her heart sank. None of them matched. The lines were different. The shading was wrong. "They don't look like his," she whispered. "Look for a name," Raven said. Yuki leaned in and checked each corner. The black cat canvas had no signature. The kitten had none. Only the tabby held a small mark, too smudged to read. Yuki's hope shrank. She could not tell whose hand drew the poem. The wall gave her nothing but strangers' cats. Down the hall, a voice rose. Yuna Starling stood with a small group, talking fast about Kai Ravencroft. "He looked right at me, okay, I'm not making it up, he did—" She stopped. Her eyes found Yuki, and her face pinched into a frown. Yuki knew that look. Yuna had disliked her for weeks, always sharp, always cold. Yuki dropped her gaze and tried to shrink. Raven stepped forward. She did not raise her voice. "You have a problem with her?" Raven asked. Flat. Direct. The group went quiet. Yuna crossed her arms. "I don't—it's not—" She stopped, started again. "She keeps sniffing around Kai. Everyone knows it. The notes, the library, all of it." She jerked her chin at Yuki. "So yeah. I've got a problem." Yuki froze. Yuna knew about the notes. That meant others might too. But something in the words caught. Yuna thought the notes came from Kai. Yuki had suspected him herself, then doubted it. "Kai draws these?" Yuki asked, and held up the poem's margin. Yuna's mouth opened, then closed. She looked at the sketches. "No," she said slowly. "Kai can't draw. He can't even draw a stick guy. I've seen his club notebook." She frowned harder, but not at Yuki now. "That's not his." Yuki's breath caught. The wall had failed her. But Yuna had not. Kai was out. Two suspects had become one. "Then it's not Kai," Yuki said, half to herself. Raven pulled her back toward the gate. "Come on. We know more than we did." Yuki tucked the book away. The artists' wall held no answer. But one name had fallen off her list, and only one boy remained.

One boy remained. Hiro Takeda drew cats. Yuki was almost sure. But knowing a name meant nothing if she never saw his hand at work. She needed proof. She needed to watch him sketch. The problem was simple: they shared no class, no club, no place to sit near him without a reason. So the next afternoon she went where anyone might turn up. "The mall," she told Raven. "People sketch there. Maybe I'll catch him." It was thin. She knew it. Raven walked beside her through the glass doors, flat as ever. "You won't find him by wandering," she said. She said it the way she said everything true and obvious. "I have to try something," Yuki said. They passed a fashion window. Two blank mannequin forms stood behind the glass, one male, one female, posed like a matched pair. Yuki slowed to look. Then she stepped back and hit someone. "Whoa." A hand caught her shoulder, steadying her. Yuki turned. Kai Ravencroft grinned down at her, purple plaid loud in the bright store light. Of all people. Kai, the senior everyone circled, the one Yuna guarded like a prize. Yuki's stomach dropped. She wanted the floor to swallow her. "You're the ghost," Kai said. "You leave every room I walk into." Yuki's face went hot. "I—wasn't watching where—" "Clearly." He nodded at the mannequins. "You two shopping for a boyfriend? He's a little stiff." Raven didn't blink. "He's your type." Kai laughed, real and loud. "Brutal." He fell into step with them, hands in his pockets. Yuki didn't know how it happened, but suddenly he was just there, walking with them like it was normal. They drifted past shops. Kai pointed at a cat plush in a toy window. "That's you," he told Yuki. "Grey. Suspicious. Wants to leave." She almost smiled before she caught herself. Raven picked a hideous yellow hat off a rack and put it on him. He wore it three stores. Yuki forgot, for whole minutes, why she'd come. She was watching for Hiro. Instead she was laughing at Kai balancing the plush on his head. He kept finding her eyes and holding them a beat too long. "You should come around more," Kai said, quieter now. He'd stopped joking. "You always slip off before I can talk to you." Yuki looked at her shoes. "I don't do crowds." "I'm not a crowd right now." He said it plainly. It landed harder than any joke. Then his friends called from the food court, and the moment broke. Kai handed the plush back. "Later, ghost." He was gone into the noise. Yuki stood there, warm and confused. She had come to catch Hiro drawing. She hadn't. She'd found nothing about the notes. But something had shifted. She'd told herself Kai was out, just a name off a list. Now her chest wouldn't settle. Raven watched her sideways. "That look," Raven said, "is a new problem."

The morning after the mall, Yuki couldn't focus. In science class she sat two rows back from Kenji Mizushima, the quiet boy from her own club. He usually just read. Today his pencil moved fast. Yuki leaned to see. He was drawing cats. Small, round, careful cats in the margin of his notebook. Her stomach twisted. She knew that shape. It looked like the sketches in her library book. Kenji drew the way the note-writer drew. She should have been glad. One name meant proof. Instead her chest went tight and cold. She thought of the poem, the tiny cats, the person she'd imagined for weeks. She hadn't imagined Kenji. She'd started to imagine Kai. After class Yuki walked to the quad and dropped onto the open lawn. She set her grey plaid backpack beside her and stared up. Clouds moved slow. She kept finding Kai's face in them. She hated that she did. Raven sat down without a word. She pulled up a blade of grass and studied it, the way she studied her plants. She waited. "I saw Kenji drawing cats," Yuki said. "In class. They looked like the ones in my book." "So it's him," Raven said. Flat. Like the answer was obvious and she was done. "That's the problem." Yuki pressed her hands over her eyes. "I don't want it to be him. I keep hoping it's Kai. I saw him for one afternoon at the mall and now I can't think straight. I was hunting for the writer, and I stopped caring who it was. I only cared it might be Kai." She let her hands fall. "I can't trust what I read in those notes anymore. Not while I feel like this." Raven turned the grass blade over. "I don't know," she said. "I saw Kai drawing a cat today too. In the library." Yuki sat up. "By the short story shelf," Raven said. "Small. Round. Like yours." The cold in Yuki's chest flipped to something faster. "Kai can't draw. Yuna said so." "Yuna says a lot of things." Raven shrugged. "He was drawing. I watched." Yuki looked back at the clouds. She had two boys now. Two hands that drew the same cat. She'd wanted to sort her feelings before she trusted her read. But her feelings had just answered her. The face in the clouds was Kai's. And now Raven had put him at the exact shelf where every note began. "Then I stop guessing," Yuki said. Her voice was low but steady. "I go to the library after class. I watch the shelf myself. Whoever leaves the next note, I catch his hand doing it." Raven dropped the grass. "Finally." Yuki grabbed her backpack and stood. The confusion hadn't lifted. But she knew what she wanted now, and it aimed her straight at the shelf.