Mizuka desperately searches for the creepy old man who knew her personal details from their previous encounter. Unbeknownst to her, the old man has already made contact and introduces himself as a friend of the family. The unsuspecting sisters, including the pure and innocent younger sister Momone, welcome him into their home.
Overwhelmed by Momone’s massive, explosive breasts, the perverted old man breaks down in lust and pounces on the clueless girl. He introduces her to intense pleasure for the first time, melting her innocent mind into complete ecstasy through relentless paizuri and more. By the end, a thoroughly corrupted Momone eagerly agrees to meet him again