Night. Mayumi Kurioka is a nurse. Today is the night shift. As she is patrolling the hallway after the lights are turned off, a man in black...

A wealthy man has relationships with a married woman, an office lady and a high school girl. Two of them are friends, two are sisters and one...

Two high school girls, an older sister and a married woman all vie for the attention of a tutor. Needless to say not much studying gets done.