Shortcake and Kase-san. Since it's the last summer, let's go to the pool! Yamada from the gardening club and Kase-san, the ace of the track and field club, are dating, even though they are both girls. As Yamada supports Kase-san, who is working hard for the upcoming Inter-High, she finds herself absentmindedly pondering her own future. And what about their relationship with Kase-san...? The third installment of the popular series!