Hiroki, who had already started working before his son, came to stay overnight after a long time. Unlike his student son, Ayaka was impressed by his adult manner. Interested in him due to his lack of sex from being busy at work, she tried to have a casual fling but... She was fucked continuously by his relentless sex, making her feel like she was going crazy! After that, every day Hiroki's endless desire for Ayaka, finally her body reached its limit.