Masachika Kuse sits next to Arya, a girl of Russian and Japanese descent, and while she is an exceptional student and Masachika is known for being a slacker, the two develop a friendship even though he can barely understand what she is really saying.
Masachika finally recognizes Maria as the girl from his memories--his first love. After a memorable summer, Masachika and his classmates enter their second semester at Seiren Private Academy! Knowing how much the school festival influences the presidential elections, Masachika encourages Alya to get involved. But he becomes uncomfortable when the distance between her and her classmates shrinks. "Are you...jealous?" As Alya smiles mischievously at him, his heart skips a beat.
Set during summer vacation, the story follows Masachika and Alya as they grow closer, with Alya starting to call him by his first name. The student council embarks on a trip to a private beach, where romantic possibilities abound amidst swimsuits, hot springs, and a lively summer festival. As they engage in playful activities, the atmosphere is charged with potential for deeper connections and unexpected moments.