Airi Rui was a rival who competed against each other in terms of ability. One day, she lost in practice and shared her first kiss with Ai. The distance between the two of them quickly closed, fingering each other in the clubroom when no one was there, cunnilingus during class, fingering each other, spreading the scent of sex all over the school. They lick each other's pussies on all fours, and take videos of each other masturbating with their smartphones. They rub their wet crotches together in a secret school lesbian sex that no one can tell anyone about.