Meguru kaikan: Ano hi no watashi to etchi shite

Original title: めぐる快感 あの日の私とエッチして

Directed by Mototsugu Watanabe

In the Urban Legend Research Club room, sisters Ayaka and Rinka are discussing urban legends with Shuhei and others. Shuhei becomes absorbed in his research after Ayaka casually mentions "sending an email from the future to his past self."