Kameichi is an elderly man struggling financially. Suddenly, a woman named Emi Harukaze appears before him, mistaking him for a Japanese painter named Ijuuin. Seizing the opportunity, Kameichi uses his mistaken identity to play a series of lewd pranks. Despite feeling weak from a cold, he forces her into harassing dry rubbing sessions. He receives sensual drawing lessons while she licks his neck, then proceeds with naughty acts using paintbrushes, eventually escalating to mixed bathing. Irresponsibly, the old man ends up ejaculating his semen deep inside the young woman's vagina.