Infuriated by her husband's infidelity, Mahi decided to take her son Keita and stay at her sister's house for a while. However, her sister Ayano and Ayano's son Takahiro have a forbidden relationship. After seeing them, Keita was aroused and began to pursue a relationship with Mahi... In this way, the two pairs of mother and son under one roof, their relationships became entangled, and the curtain rises on an incestuous mother-son swap drenched in lust！！
