In the fifth installment of the Seishun Buta Yarou series, Sakuta is taken by surprise when his first love, Shouko, reemerges after years of silence with a request to meet at Shichirigahama Beach. Caught off guard while being in a happy relationship with Mai, he grapples with how to handle this unexpected reunion. Meanwhile, he diverts his attention to assisting his panda enthusiast sister, who harbors a dream of returning to school but faces the challenge of overcoming her agoraphobia that has confined her to their home for the past two years.