Yuto Hanegi can’t stand lies, but can barely handle truth. He’s quiet and odd, keeps to the library, and watches people more than he talks to them. Some say no one knows him—a shadow just drifting along a sunlit hall.
New girl Miho is sharp, and hates not knowing stuff. She’s the first in years to say hi to Yuto and mean it. “Ever been upstairs?” she whispers in math, eyes wide as if the word itself is trouble.
“There’s a forgotten room on the fourth floor. Nobody goes. It’s always locked,” Miho says, excited yet afraid. Yuto shakes his head. “Isn’t that just a tech closet?” he says. She gives him a look. “No one has a key. Even the old teachers say to stay out.”
School has its ways and its rules. Principal Morimoto says they’ve kept it shut after some “incident” in the eighties. But the teachers laugh it off—a power cut? Old lab gear? Still, kids tell tales. Flickering lights from gaps in the door at night. Strange songs if it’s windy.
Miho only wants to see what’s hidden. “Bet there’re stuffed animals or club stuff in there,” she grins. Yuto, though? Since noon, he feels watched—every step in the east wing is louder. That night, he dreams of a key in his hands. It’s cold, rough, and heavy as a brick. When he wakes, the backdrop is rain and a tapping sound at his window.
The tension rises at lunch, talk blowing through the cafeteria about footprints up those forbidden stairs. Ryo, soccer captain, jumps in: “Once, I heard music. Like an old tape. But when I went up, lights went pop and I ran for it.” Others laugh, some nod.
Miho is set. After study group, they slip away. There’s a fire alarm drill—the only time all staff are outside. Sweaty palms, jumping heart. Yuto follows, unsure if he wants to see secrets or run. Don’t we all wonder which move we’d make? 
The old wooden stair groans under them, threatening to tell on every step. The hallway above is coated with dust. Sun leaks in, grey and pale.
The locked door isn’t fancy. Just an old plaque: Room 4-5. Miho pushes, twists, then says, “Help me, Yuto.” His touch burns as he turns the cold metal. Oddly, it opens. He frowns: Was it ever even locked?
The room glows in shadow and gold. Stacks of books line the far wall; scraps of posters flutter. Mold creeps across a science chart. In the corner is a faded box marked in red, “Do Not Touch.” Yuto pulls it near.
A single ribbon, old notebook, and a small nametag slide free. Miho bends closer. “My mom’s maiden name… It’s written here,” she whispers. Yuto steps back. “So what now?” But the floor shudders—someone’s outside, slow steps echoing in the narrow hall. The doorknob jiggles.
Cliffhanger: Yuto dares a look through the tea-dim light—shadows grow, and fierce whispers ring, low but full of something old. The source can’t be seen. Next moment, the door starts to swing shut by itself. Will they dare look deeper? Or dash before what’s buried notices they’ve come?
