[DASS-579 English Subbed] – My girlfriend’s mother is more appealing to me than my girlfriend, and my dick is so hard it hurts.

DASS-579 English Sub – Sakai and Kokoro are in a relationship, but things take a turn when Sakai meets Aiyu, Kokoro’s mother, who has a voluptuous figure. While using the bathroom at her house, Sakai catches Aiyu masturbating and pretending to be Kokoro, calling out his name. This incident arouses Sakai, and he masturbates, but Aiyu reaches climax first. The encounter leaves Sakai unsettled and obsessed with the incident. He becomes fixated on Aiyu and pressures her into a romantic relationship.