下级生：我可爱的学妹

【STORY】 Volume.1 Nanahoshi Kakeru admires his classmate Hiromi, but is currently single. One day, Kakeru meets Kasuga Urara, the best friend of his younger sister Mika. Kakeru is drawn to the pure-hearted Urara, and Urara also becomes interested in the kind-hearted Kakeru. When Urara comes to the Nanahoshi household to study with Mika, she learns of Kakeru's feelings for her and confesses her own feelings to him... Volume.2 Urara departs for America due to her parents' job transfer. Feeling down, Kakeru is invited by his best friend Takeshi to join the tennis club. There, Kakeru tends to Natsumi Rie, a tennis club member who collapsed during self-training. Since then, Kakeru becomes aware of Rie's presence, but Rie likes the tennis club captain, Douda. However, after witnessing a love scene between Douda and the club advisor, the heartbroken Rie... Volume.3 While everyone is busy preparing for the school festival, Kakeru meets a quiet, beautiful girl sketching in a park. This girl is Akimoto Hikari, his junior and a member of the art club. Becoming closer to Hikari, Kakeru promises to help her with her sketches and is invited to her mansion on the day of the festival. In the private atelier for just the two of them, a sketch of love begins... Volume.4 One day, after finding a motorcycle key on campus, Kakeru gets to know his junior, Fuyuki Tsubomi. Though Tsubomi appears tough, she is a strong-willed girl who fights to protect her classmates from delinquents. Tsubomi takes a liking to Kakeru, who treats her kindly, and the two go out on a motorcycle tour. However, caught in a sudden blizzard, they are forced to take shelter in an unmanned cabin, but...