Aoi Tsukasa, who is said to be more prone to accumulating sexual desire than others, underwent a month of no masturbation or sex, resulting in her perverted and nymphomaniac tendencies reaching their peak! In a state of heightened sexual tension, she delivered herself to the home of an average man who boasts of his exceptional virility! The man, who works for a certain company, has a completely submissive M-type personality. It turns out... their sexual compatibility was perfect! She treated his penis like a grown-up toy, and with the nymphomaniac sister releasing her sexual desire, and the sexually exuberant masochistic man getting excited being treated like a toy, their abnormal sex unfolded!