Kôgan muchina chibo: Murasaki no shitagi de... 2007

Directed by Daisuke Yamanouchi · Drama

Kayoko lives with her husband and daughter. One day, after stepping out of the shower, she finds a man wearing a balaclava in the room. They soon engage in a wild sexual encounter; the man turns out to be the son of Yoko, a married woman living next door.