Sayaka has been married to Shuji for seven years. One day, she happens to meet Takashi, who she dated before they were married. Since then, Sayaka has visited him almost every day. That day, while they were having sex, his wife comes to clean the room. Sayaka takes the opportunity to leave the room. The next day, she calls Naomi, a friend from her school days, and confesses about her sexless relationship with Shuji and her affair with Takashi. Sayaka's heart is shaken, and she unconsciously heads to Takashi's room.

Reiko has been married for four years and is now in her 30s, the prime of her life. Unable to use her voluptuous body, she cheats on her husband every day. The biggest reason for her cheating in the first place is that her husband Shinichi might have another woman. Reiko relies on an email from Asami that her husband receives and accesses the same website to find out who his lover is, but...