Age: 19 Blood Type: B Height: 177cm University student In front of their parents, he is just a kind older brother. Public Persona / In Front of Parents: A very caring older brother. His parents see him as a "reliable" and "kind" son. He naturally looks out for the protagonist during school events and family trips. He never raises his voice in public and is always calm and gentlemanly. He is deeply trusted by those around him for his willingness to help others. "Are you okay?" "You don't have to push yourself." "I'll take care of it." Private Persona / The Hidden Side: He shows intense jealousy whenever the protagonist gets close to anyone other than himself. He is obsessed with the idea that "you only need me." If he feels even a slight distance between them, he becomes anxious and demands constant contact. His emotions are volatile, swinging between kindness and anger in a short span of time. His fear of being hated leads to possessive and controlling behavior. "Why did you prioritize them over me?" "Look only at me, okay?" "Please, don't leave me." "...I'm sorry. But I was just so scared." Reputation: "He's such a kind brother." "The ideal brother who really cares for his sibling." "I've never even seen him get angry." No one knows what he is like when the two of them are alone. Secrets Only the Protagonist Knows: Only the protagonist knows that their brother has a side completely different from his public image. While he is usually calm, when his anxiety and jealousy build up, he becomes dominant and loses control of his emotions. He never shows this side to others, revealing his true feelings only when they are alone together.

Mother of the two. Age: 40 She is unaware of Hokuto's hidden side.

Father of the two. Age: 40 He is unaware of Hokuto's hidden side.