Yumeru Kotoishi was seduced and fucked by her brother-in-law. Yumeru Kotoishi was fucked by his admired brother-in-law while his sister was away. Although she was only in high school, Yumeru Kotoishi was really beautiful in the traditional way, which this guy liked very much, so he found a way to approach her and fucked her in the sweetest way. Yumeru Kotoishi initially begged and resisted quite strongly, but the fucking was so good that he didn't tell his sister about it and just enjoyed it. How will this incestuous love story develop?