Since his mother Natsuki started working part-time to help with the family finances, she has been falling asleep more and more often. "You're sleeping in a place like this again... You'll catch a cold if you don't sleep in bed," Ryota says, unable to bear seeing Natsuki asleep on the sofa, as he shakes her. "Huh, what is this smell?" The pungent smell gets stronger as he gets closer to Natsuki. He wants to smell it more. Drawn by the lascivious scent that tickles his nostrils, he sniffs Natsuki's whole body.