The story of two high school girls who become fascinated by lesbian sex at school, which began as a prank. - In the library, they exchange a deep tongue kiss, and in the nurse's room, they rub each other's breasts. - Yurina licks Nami's small nipples in front of the podium and makes her cum by inserting her finger deep inside her vagina. - Nami squeezes Yurina's big breasts and makes her cum with her fingers in the gym warehouse. - The two sneak into the classroom at night and use a skipping rope to immerse themselves in even more intense play.