This is Yukari's smell... On the day he came to stay at his childhood friend Mikawa's house. Shinya discovered Mikawa's mother Yukari's underwear in the dressing room and impulsively sniffed it. For Shinya, who had admired Yukari since he was a child, it was a blissful moment. However, Yukari herself witnessed him clutching the underwear and getting an erection. An awkward atmosphere flowed between the two. After being gently reprimanded, Shinya was pushed even further into a corner and, half-desperate, confessed his feelings for Yukari and forced himself on her.