Since losing her beloved husband, her mother, Alisa, has lived quietly with her husband's stepchild, Takashi. One day, she receives a proposal from Sato, who she met at work and was in a relationship. She was a blessing to Arisa, who was struggling to make ends meet, and thought positively about her, but Takashi insisted, "I'd rather be with my mom." After that, the relationship between Arisa and Sato deepened further, and the two often indulged in love affairs. However, Takashi's eyes can be seen from the gap... Seeing Sato munch on Arisa's plump bust and hips, Takashi's flames of jealousy burn. And the abnormal desire for the body of "mother" has also awakened.
