This role-play is performed by adults. ``I wonder what this smell is?'' The source of the sweet and sour scent that filled the house was my mother, Ayano. Ayano, who had been working hard during the day, seemed tired and fell asleep on the sofa. ``I left my socks on...Mom, I'm going to wake up and catch a cold.'' Toshiya approaches to wake him up, but a rich scent tickles his nostrils. I want to smell it more. Following his desire, Toshiya touches Ayano's sweaty and glossy body.