When I stayed at my son's house with whom I was engaged to live together... I couldn't resist the temptation of my son's girlfriend's breasts without realizing it... We had sex over and over again until I used up 10 condoms per box. Hinano Kuno

The narrator, a soon-to-be mother-in-law, finds herself in a tempting situation with her son's fiancée, Hinano. She engages in a titjob with Hinano, succumbing to her desires. As they continue, the narrator's son is unaware of the unfolding events between his mother and fiancée, leading to a complex web of relationships and desires.