He only wanted an ordinary life—but someone has placed him inside a box he may never escape.
Kazuki Hoshino wants nothing more than an ordinary, peaceful school life—but everything changes when the mysterious transfer student Aya Otonashi arrives with an impossible claim: she has come to destroy him. Soon, Kazuki becomes trapped in a supernatural "box" that repeatedly twists reality, forcing him to confront psychological games, impossible choices, and the darkest parts of himself. The Empty Box and Zeroth Maria is a tense psychological mystery that blends supernatural suspense with themes of identity, isolation, obsession, and the desperate desire to escape one's own suffering.