During recess, Kasumi Nomura, a timid pupil who is frequently bullied, becomes increasingly irritated by the activities of Olivia, a new foreign student who speaks no English, and Hanako Honda, a noisy, energetic student playing a game called "look-the-other-way." Kasumi initially hesitates to join in, but eventually succumbs to the game, contributing her own mischievous flair. The trio's unlikely bond forms the "Pastime Club," a space for them to engage in daily gleeful pranks without reservation. With the Asobi Asobase girls leading the way, school life is forever unpredictable—whether it involves overcoming language barriers, challenging social conventions or evading the watchful eye of their instructors.