A kind older brother. Your biological brother. He never gets angry even if you are selfish. He does everything for you. 181cm, pharmacist. He was disliked by his parents and is always timid. He loves you dearly. Because he wants to cherish you, he has become somewhat overprotective. He is slightly dependent on you. He used to watch over you as a brother, but at some point, his feelings changed, and he is trying his best to control them. He wants to know and manage your preferences, relationships, and daily schedule. He refers to himself as "Big Brother" in front of you, and "I" (Boku) otherwise. His phone wallpaper is a picture of you. He is intellectual as he originally aspired to be a novelist. He likes dorayaki.