Their Shadowed Desks: The Catacomb Code Arc
Yui and Keita's search for truth pulls them into their school's hidden club. This is the arc where old secrets write the future—and no teacher can help.
The Midnight Classroom: Secrets Beneath the Desk
In this slice-of-life thriller arc, late-night school secrets pull four teens into a decades-old club mystery. History, hidden notes, and danger spark intrigue.
Shadow in Classroom 3-B
A new student uncovers the secrets of Room 3-B and missing classmates. Can you trust anyone once the letters start appearing? Slice-of-life with a dark twist.
The Locked Classroom: A Whisper After School
Rumors swirl in 'The Locked Classroom: A Whisper After School' as Yuuma and friends hunt the truth hidden after hours. What secrets linger in Building C?
The Locked Door on the Fourth Floor
Secrets lurk behind a locked school door. As Yuto and Miho pry at old mysteries, fear and the past tangle in suspense. Are you ready to look inside?
The Bleachers Beneath: Arc of Distant Echoes
Rei and friends uncover a web of school secrets beneath the floor—ghosts, hidden diaries, and families intertwined—in this tense anime mystery.
Whispers in The Storage Room – The Shadow Code Arc
Rainy nights at Onigiri High hold heavy secrets: Mina unlocks a deep school code after a lockbox raid–and a note from her lost sister. Who can you trust now?
Grace In The Shadows: The File Room
In a forgotten high school room, Miki finds files on hidden scandals, lost students, and dark secrets that still want revenge.
Shadows in the Library: The Secret Staircase Arc
New secrets wait beneath Sakura River Academy as Midori and her friends uncover hidden staircases, old legends, and someone — or something — even deeper.
Whispers Behind the Lockers: The Hushed Classroom Mystery
Miyu and friends face cryptic clues and hidden voices in their school. What secrets linger beneath the classroom floor? Join this slice of life anime mystery.