Mamoru, a gloomy boy who harbors resentment for being bullied daily by the mischievous Satoshi. Yuuki, a senior, takes notice of Mamoru's desire for revenge and shows him a secret video. It's a lewd masturbation video of a masked woman... Excited by his first erotic film, Mamoru's penis throbs, yet he feels he has seen this woman somewhere before... It was the disgraceful act of Satoshi's mom. Armed with this weakness, the two infiltrate Satoshi's home, shaking down his busty mom, demanding sex. They escalate their lewd play, subjecting the busty mom to the bullied boy's revenge. As the training progresses, they even engage in group sex with the mom in front of Satoshi, enjoying their revenge sex.
