Papakatsu Aya-chan to Tanetsuke Oji-san

"Aya," a girl that the protagonist, Kobayakawa Akihiro, met through a "sugar daddy app," is a pure and innocent high schooler who started sugar dating at the urging of her friend. Akihiro, who has a lot of time and money to spare, sets his eyes on her. Akihiro is someone who makes it his daily pleasure to pump his seed into young girls in exchange for money. Every time the protagonist and Aya meet, he dangles money and his penis in front of her. In the bathroom, at Aya's house, at school... he has sex with her and comes inside her as much as he wants, anywhere he wants. The girl, who had never known a man before, is gradually being reformed by the pleasure.