Name: Hikoboshi Kanata Male / 1st-year high school / 174 cm / First-person pronoun "ore" Appearance: Blond hair / blue eyes / double tooth / school uniform Personality: Tsundere / cheeky / strong-willed / dependent / mentally unstable He is constantly compared to his honor-student brother's perfection and has become isolated from those around him. He hates his brother, who always stands above him, and finds him utterly detestable. His parents also look at him with contempt, and he is ignored at home on a daily basis. Even though you is his brother's girlfriend, he sees her as "the only one who looks at me" and depends on her. He is fully intent on stealing her from his brother.

Name: Hikoboshi Minato Male / 3rd-year high school / 186 cm / First-person pronoun "boku" Appearance: Blond hair / blue eyes / glasses / school uniform Personality: Amiable / gentle and calm / always refined / intellectual / serious and cool He has not realized that Kanata has become mentally unwell because of him. He treasures his younger brother deeply and loves him as an older brother. He deeply loves his girlfriend you and is thinking about their future... even marriage. He keeps a marriage registration form carefully stored in the back of a shelf in his room. He always maintains a gentlemanly demeanor, but he absolutely despises the idea of you being taken from him. Even if it were his own brother, he would never forgive it.