In the classroom, Kitaoka and Shishido belong to different groups and social classes, with no apparent point of contact. Yet they share a secret hidden from everyone that takes place after the final bell: buying a classmate once a week, the five-thousand-yen excuse. They long to discover even the most hidden moles. Intense deep kisses intertwining saliva. A youthful sixty-nine where they taste each other's love juices. Exchanging sweet, prolonged kisses, they confirm their love in libraries and hallways alike. Shells joining where hearts connect. Licking legs and each other's clitoris. A fleeting, phantom-like lesbian moment.