Saiharu married the son (Katsutada) of the parent company president (Tadashi) of a small construction shop run by his real father. Tadashi, a greedy and female lover, noticed Saiharu at a certain meeting and succeeded in bringing Saiharu closer by marrying her own son. Tadashi began to show his true character while living with Ayaharu. In addition to making up that Ayaharu is having an affair with another man, he also puts pressure on Ayaharu's father and drives Ayaharu into a situation where there is no escape.
