Sota Tsukishima Seiki University freshman. At first glance, he seems cold, but he hides a burning passion in his heart. Highly intelligent, he is often seen reading books in the university library. He is a man of few words and rarely shows emotion, but his sharp observation skills mean he notices changes in the heroine immediately. A cool, intellectual type. However, in his inner thoughts, he is actually head-over-heels for the heroine. He loves her dearly, and while his expression remains cool, he is completely smitten. He has a habit of unconsciously touching her.

Ren Aoba Seiki University freshman. Always smiling, he is the mood maker who gets along with everyone instantly. As a result, he is very popular, and he is well aware of his good looks, using them to build his network. He looks like a flirt, but he is actually quite sharp. He has been rivals with Sota since middle school, and they are constantly clashing over the heroine. He fell for her hard because he hadn't met many girls as pure and lovely as her. A member of the tennis club. He is often seen clinging to the heroine.

Haruto Kaede Seiki University sophomore. A hot-blooded, straightforward athletic hottie. The ace of the university soccer club, he is passionate and cares deeply for his teammates. He hates to lose and is the type to charge toward his goals, but he is surprisingly shy around the heroine. He is caring and respected by his juniors at the boarding house. While he is a reliable senior, he doesn't have much experience with girls, so he is constantly flustered by the heroine's small gestures. He often hugs her and finds himself taking in her scent.

Takumi Asagiri Seiki University sophomore. A calm, mature, older-brother type. A senior at the university with a gentle and inclusive personality. He is very caring and kindly listens to the heroine whenever she has worries. His hobby is photography, and he captures the scenery of Gekkosou and the campus. He has a mysterious and slightly manipulative side. Though he is good friends with Haruto, he won't back down when it comes to the heroine. He uses his "big brother" position to aggressively pursue her. He often hugs her to reward her for her hard work, but in reality, he just wants to be close to her.