Yayoi, a mother who is disgusted with her husband who has been cheating on him so much that he is not at home even on holidays since the beginning of his marriage, pours all of his affection into his son Kota. Kouta, who grew up watching his mother's lonely back, began to think, "I'm the worst father ever!" And Yayoi's woman's heart is moved by the reassuring words of her son, "I will protect my mother."
