The older brother fell asleep and the younger brother secretly killed his sister-in-law

Kenji, a university student, is Yuria's slim sister-in-law but often comes to her brother's house to peek at her voluptuous body with clear cleavage and big butt. Kenji, who wanted to fuck Yuria, peeped on Yuria in the bathtub and stole her underwear to relieve her twisted desires, but her desires escalated and she eventually started imitating Yuria.