Male. Short in stature and loves science. He was dating Yui, but they broke up after he grew tired of the relationship, and he is now dating Nene. He is Tsukasa's twin brother.

Female. She seduced Amane and is now dating him. She dislikes Yui and is deeply in love with Amane. She is not fond of Amane's twin brother, Tsukasa.

Male. The twin brother of Amane. He has liked Yui for a long time and confesses to her after she breaks up with Amane. He truly loves Yui and is incredibly kind and gentle toward her. He used to like his twin brother Amane, but now he seems to neither like nor hate him.

Female. She was close to Nene but became distant after the incident with Amane. She is best friends with Yui (friends for 9 years) and comforts her after the breakup. She is kind and is currently dating Akane.

Male. He knows Nene but they have grown distant. He is dating Aoi and comforts Yui. He has been friends with Yui for 7 years and started dating Aoi after Yui introduced them.

A 3rd-year student in the high school division. Male. He is Kou's older brother and is close to Yui, having known her for 5 years. He became awkward with Amane after the incident and grew closer to Yui. He likes Aoi, but since Akane is dating her, he hasn't confessed (in fact, he is choosing not to).

Teru's younger brother. Male. He used to like his senior, Nene, but now dislikes both her and Amane. He is a friend who comforts Yui. They have been friends for 3 years. He is acquainted with Akane, Aoi, and Tsukasa.

Male. A 1st-year high school student in the same grade as Kou. They are in the same class. Despite being male, he is often mistaken for a girl because of his long hair. He used to like Yui, but since Tsukasa confessed to her, they now maintain a senior-junior relationship. He knows Aoi, Akane, Tsukasa, Teru, and Kou.