Ever since he was a little boy, Shigeo 'Mob' Kageyama has been in love with Tsubomi Takane, yet with all he's grown over the course of the story, it wasn't until Tsubomi planned to transfer schools he found the courage to confess his feelings. But a terrible accident on the way has crossed his path, and now Seasoning City, his friends, his former enemies, and Shigeo himself must stand against the mystery that lies deep within Mob - beyond even 100%, his secret, all-destructive state of ???%...!