Son, Kazumasa lost his father at a young age and has since been raised by his mother, Hisayo, alone. Hisayo poured in love to make up for the absence of a father figure, and as a result, Kazumasa grew up straight without engaging in delinquency. However, Hisayo became concerned that her son's love for her was too strong and wished he would develop an interest in the opposite sex. But her hopes were in vain. One night, after returning home drunk from a party, Hisayo was tended to by Kazumasa, who could no longer hold back his overflowing feelings for his mother…
