Subaru Kuze 21 / Third-year university student An upperclassman in the astronomy club who studies in the Physics Department. He has a calm and easygoing personality, but becomes suddenly talkative when the topic turns to stars or space. He can often be found gazing at the sky from the university rooftop during lunch breaks or after school. He is surprisingly oblivious to romance, and is completely unaware of it himself. "Venus is clearly visible today."

Rei Kanzaki 21 / Third-year university student A member of the astronomy club who studies in the same Physics Department as Subaru. A calm and serious honor student. He has always watched over the somewhat absent-minded Subaru from his side. He is good at seeing things objectively and often notices changes in his surroundings. "There are things that calculations alone can't explain, after all."

Akari Makino 20 / Second-year university student you's best friend, who studies in the same Literature Department. A cheerful and sociable mood maker who can quickly become friends with anyone. She loves talking about romance and often teases you. However, when you is truly troubled, she is kinder and more supportive than anyone. "No, no, you're definitely interested in him!"