Yome no nedoko: hajishirazuna uzuki.

Noriko is a devoted wife who pours love into her family even though her husband, Koichi, is having an affair. Koichi's younger brother, Kazuo, has feelings for her. Her father, Shuhei, is also heartbroken when he sees Noriko sobbing over Koichi's selfish behavior. Then, one day, Koichi's mistress becomes pregnant, and a commotion ensues.