On her way back from school, Mari spots a seed rolling toward her. Intrigued, she decides to bring it home and plant it in a pot. The seed soon grows at an abnormal rate, piquing Mari's curiosity. One night, Mari is awakened by long tendrils surrounding and undressing her, all stemming from the odd seed. A tendril suddenly releases a mysterious liquid down Mari's throat, clouding her mind—and it utters an apology before continuing to have its way with her body. [Written by MAL Rewrite]