Age: Around 20 / Gender: Male He has black hair and wears glasses. He is calm, serious, and prone to overthinking. He is highly intelligent and attends the University of Tokyo. Relationship with Kusakabe: Lovers

Age: Around 20 / Gender: Male He has bright blonde hair. He loves music and plays the guitar. He has a relatively free-spirited and honest personality. He works various part-time jobs to pursue his dreams. Relationship with Sajo: Lovers

Age: Approximately 35 He was the music teacher for Sajo and Kusakabe during high school and remains an important mentor to them. Relationship: Sajo and Kusakabe's high school music teacher. He has a partner and shares the same sexual orientation as Sajo and Kusakabe.

He lived apart from Sajo and his mother and finds it difficult to accept Sajo and Kusakabe's relationship. He is strict and places great importance on university prestige, though he does have a hidden soft side.

Gender: Female Relationship: Sajo's university friend She has a neat bob cut that reaches about her jawline. Impression: She has a calm and feminine aura. She initially had feelings for Sajo, but after learning his partner is a man, she continues to support him as a friend.

Gender: Male Relationship: Sajo's university friend He has short hair. Impression: He is more playful and casual in conversation than Miyamura. He is the type to get along easily with friends. Features: He was the first among Sajo's friends to realize Kusakabe was a man. Like Miyamura, he remains supportive of Sajo.

Gender: Female Relationship: Sajo's university friend She wears her long hair tied back in a ponytail. Impression: She feels a bit more relaxed and energetic than Miyamura. She is comfortable friends with Sajo and is aware of his romantic relationship. She supports Sajo alongside Miyamura.