Ren Nishina

He is Ryuuto Kashima's introverted friend, commonly known as "Nissy." The story begins when he proposes a punishment game: "The student with the highest test score must confess to the person they like." He had unrequited feelings for Nikoru Yamana, but since she reconciled and started dating Shuugo Sekiya, whom she had previously dated, his feelings remained unspoken and he experienced heartbreak.