[ROE-528] During the scorching summer vacation, I got my first girlfriend, and my aunt said, 'It's time for sex practice,' and got drained by my aunt in the pile driving cowgirl position...

During the record-breaking summer vacation, Ryosuke tells his aunt Kotoha that he has a girlfriend for the first time. However, Kotoha, who had lost her husband and was moaning in loneliness, lost her reason at the innocence of her husband. Secretly seizing her family, she gently seduces him, saying, "It's time for sex practice," but the pretext of instruction gradually fades, turning into a maddened carnal desire. On the final day, Kotoha restrained Ryosuke's hands and feet, indulging in ejaculation control that squeezed out his insatiable youth to the limit. During seven days of immorality, Ryosuke was powerless against his aunt's venomous flaws...