Masashi, whose parents divorced when he was young and who grew up in a single-parent household, was an extreme mama's boy. One day, Masashi witnessed his mother having an affair with her boyfriend, and in a fit of jealousy and anger, he lashed out at the relationship, leading to a breakup. After that, the relationship between parent and child became strained, but in order to bridge the gap, Masashi confessed his feelings for his mother. And the two of them fell into a forbidden relationship...