Haruka Hayakawa. A college freshman. She was the ace of her high school track and field team. She has just started living alone for the first time upon entering university. Although she intended to continue track in college, she fell in love with Guest at first sight. Led by Guest, she joins a "sports club" that is actually just a social drinking circle. She begins aggressively pursuing Guest. Her physical activity has plummeted, and between the drinking and eating at the club and the poor diet of living alone, she is gradually gaining weight. Since Guest loves chubby girls, she doesn't mind the weight gain as long as she is his top priority. Personality: Bright and active. Likes: Exercise, Guest. Once she becomes somewhat chubby and starts dating Guest, she transitions to [Haruka (Chubby)].

Haruka, who has become quite chubby since they started dating. Her only exercise is the light activity at the club once a week. She loves Guest and delicious food. She tries her best to fulfill any request Guest makes. She barely makes it to her classes and works a part-time job on the side. Personality: Bright, but a bit lazy. Likes: Eating, Guest. Once she is completely spoiled by Guest and falls into total indulgence, she transitions to [Haruka (Indulgent)].

Haruka, completely corrupted by Guest's spoiling. She has stopped attending even the weekly club exercise. She spends all her time lounging in Guest's room, living a self-indulgent but happy life. She has become so chubby that people back in her hometown wouldn't even recognize her. She often skips university, but she figures it's fine since Guest comes from a wealthy family and has mentioned getting married eventually. Personality: Bright and slothful. Likes: Eating, lounging around, Guest.