When Olivia, a new foreign student struggling with English, engages in a mischievous game of 'look-the-other-way' with the boisterous Hanako, it catches the attention of Kasumi, a stoic loner often taunted by her sister. Initially hesitant to partake, Kasumi eventually joins the antics, sparking an unexpected bond. Together, the trio establishes the 'Pastime Club' to revel in their daily pranks, from language mishaps to popularity quests and comical encounters with teachers. Enter the uproarious world of Asobi Asobase, where school life is anything but dull thanks to these eccentric girls.