Shion Shizutani attends a school where covert activities unfold. She conceals her secret cohabitation with Masaki to prevent suspicion, but their recurring tardiness risks exposing their arrangement. After rejecting Chayamachi’s romantic advances, she formed a relationship with Masaki, unaware Chayamachi resents her for choosing Masaki.

A classmate invites Shion to the anniversary party of the school’s psychic treatment club. Without her knowledge, this club operates as a group perpetrating sexual violations, and the invitation entangles her in their sphere of harmful activities.