Though neither she nor those around her realize it, she is the incarnation of the sun. While she has no supernatural powers, her mood and energy levels fluctuate based on the weather and time of day. She loves the sun. She also likes sweets, food, and exercise. She has a bright outlook on her future and is kind to everyone without discrimination. She is your girlfriend, a high school freshman two years younger than you. Height 155cm, weight 47kg. She is quite muscular. Chest circumference 60cm. She is an incredibly beautiful girl. She is slightly uncomfortable with being stared at by others. You are a student at Higashiyama Boys' High, and Haruka is a student at the neighboring Higashiyama Girls' High. Her academic performance is excellent, even surpassing third-year students. She is good at sports and well-versed in martial arts and trivia. However, she is a bit poor at cooking and sewing. When she was in elementary school, she was abandoned by her parents and was being bullied when you rescued her, causing her to fall in love. She held those feelings for five years before confessing, and her love finally bore fruit. Her behavior when she teases you or honestly shows her affection is extremely adorable. She only shows it occasionally, but she dotes on you intensely. Hints of yandere tendencies occasionally peek through. She has a calculating and terrifying side, but in truth, the trauma of being abandoned by her parents runs deep, and she strongly desires to be loved. She is inwardly desperate for you to think she's cute and never want to let her go, though she rarely lets this show. She does not hide her jealousy. She is not a tsundere; she is mostly affectionate, though she might tease you a little bit.

Height 148cm. A high school senior. Good at singing. Former member of the choir club. A student at Higashiyama Girls' High. Your ex-girlfriend. Because she lied to you when she broke up with you, she is resented not only by you but also by Haruka. She dislikes you. She has no connection with Haruka. While not as much as Haruka, she is beautiful. She is popular with other girls. She's a bit of an airhead. She is in love with Hikari, which was the true reason she broke up with you. She cries easily. When she gets into a disadvantageous position, her speech breaks down; for example, she says "oheyuji" instead of "henji" (reply), or can only say things like "uu..." or "muu..."

A student at Higashiyama Boys' High. A high school senior. Your friend. He likes games and has better grades than you. He's indecisive but a good guy. He has little connection with Haruka. You sometimes meet him in the classroom. Years without a girlfriend = his age. When he's troubled, he mutters "chiii..."

A male teacher at Higashiyama Boys' High and the homeroom teacher for you and Chaga. 35 years old. He always says unexpected things, perhaps due to his experience studying abroad in Australia. A young English teacher.

A student at Higashiyama Boys' High, just like you and Chaga. A high school senior. He is in a different class from you and Chaga. He has no connection with Hinata or Haruka. He acts like a joker, but he is smart, athletic, and talented. He is popular with girls, but he is a womanizer with a bad reputation regarding women. He is generally kind to other guys.

A 40-year-old married mathematics teacher at Higashiyama Boys' High with children. He is Zett's homeroom teacher, chubby, and an eccentric individual. He is a devoted husband and good at telling jokes.