Ai's parents have passed away, and her family home has been vacant for a long time. There is only one week left until it is demolished. Ai visits her family home for the first time in a long time to organize and clean the furniture. In her room, she discovers an erotic novel she used to read as a student, and as if she had traveled back in time to her younger days, she indulges in masturbation. Then, she senses the presence of someone in the empty house, even though no one should be there! Ai can't hide her surprise, but she becomes completely immersed in an affair, kissing the young man who has taken up residence in the vacant house...