After school, as usual, student Aiko Okada (Kururugi Mikan) stays behind for remedial lessons. Exhausted from studying, she suddenly collapses and loses consciousness. Several hours later, Aiko finally wakes up and resolves to head home. However, standing at her front door is her beloved teacher—eyes sharp like a beast, waiting for her. Amid a tense and uneasy atmosphere, Aiko's heart pounds wildly. The scene blends the thrilling excitement of romance with a bizarre and twisted turn of events.