Kawamura can't help but think about his friend's mother, Mayu. The woman he's dating is married. And what's more, she's his friend's mother. It was a love that was over before it even began. Even if it doesn't come to fruition, he wants to make some kind of memory out of it. Kawamura makes up his mind to take a peek at Mayu, and sneaks out of his friend's room... but there he finds out Mayu's lewd secret. He can't help but be seduced by her allure, which is greater than he'd imagined...