Ai Hoshina and Rui Airi, who belong to the track and field club, were rivals competing for each other's abilities. One day, if he loses in practice, he will exchange a first kiss with Ai. The distance between the two is shortened at a stretch, fingering in a club room where no one is present, cunnilingus during class, fingering and sprinkling sexual scent during school. Crawl on all fours and lick each other's ma-ko, or shoot kuchuona videos with your smartphone. Secret school lesbian sex that can not be told to anyone who rubs the crotch that became slimy.