Chikan densha: Misemasu kyonyû (2002)

Sonezaki, an elderly man, sees a beautiful woman named Eri on the train. When he saves her from a groper, the stone on her bracelet glows and she suddenly transforms into a slut. This leads Sonezaki to start living with Eri.

Stars: Reira Misaki, Kyôko Kazama, Yumika Hayashi, Syuetsu Tookaichi, Makoto Yamazaki