[DUB] Watamote (2013)

Tomoko reads on the internet that sleeping on one's stomach can lead to sexual dreams, so she immediately tries it, but has nothing but nightmares. The next day in class, a sleep-deprived Tomoko overhears some girls talking about being molested on a train. Tomoko begins to wonder why she never gets molested and calls her friend Yuu-chan to ask if it's ever happened to her...