KSBJ-101 — Domestic Affair Maihara Sei

It all started when a drunk Sei suddenly kissed her husband's brother, with whom she lives. Since then, she has been having an affair in the family, hidden from her husband. However, Sei tells her brother-in-law, "It looks like my husband will find out, so let's end this relationship soon." However, her brother-in-law has recorded their relationship on video, and uses it as an excuse to refuse to end the relationship...