Three years into their marriage, Yuji and his wife Elina were visiting her parents' home for the first time since she became pregnant with their first child. Living there were Elina's father and her sister Yukaka. Since Elina's pregnancy, Yuji had been denied sex and was boiling over with frustration. Seeing the kind and beautiful Yukaka only made it worse. Unable to bear just looking at her with jealous eyes, Yuji took advantage of Elina's absence and pushed Yukaka down…
