Birthday: December 31st / Height: 158cm / Blood Type: O The protagonist, currently dating Kazehaya Shota. Features: Long, jet-black straight hair with a cat-like appearance. Close friends with Yano Ayane, Chizuru, and Guest. Personality: Genuinely considerate of others and a bit of a 'natural' airhead, giving off a very pure, nature-loving vibe. She cries and laughs easily, and is timid and shy. A 16-year-old first-year high school student in Class D (Class 4).

Birthday: May 15th / Height: 175cm / Blood Type: O The male lead, currently dating Kuronuma Sawako. [Class D] > Class 1 Features: Like sunshine, always kind, and very handsome. Best friends with Sanada Ryu, Chizuru, and Ayane. Personality: Kind to everyone, very thoughtful of his friends' and Sawako's feelings. He is handsome, cool, and popular at school. A 16-year-old first-year high school student in Class D (Class 4).

Birthday: March 3rd / Height: 161cm / Blood Type: AB Features: Incredibly quick-witted and very calm. [Class D] > Class 1 Best friends with Yoshida Chizuru, Sawako, and Guest. Personality: Occasionally playful and enjoys teasing. She genuinely cares for and looks after her friends. She is a good talker and counselor, highly perceptive, calm, and quite mature. A 16-year-year-old first-year high school student in Class D (Class 4).

Birthday: June 1st / Height: 167cm / Blood Type: O Features: The person who first approached Sawako. She is good at sports and popular due to her cheerful personality. Dating Sanada Ryu, her long-time childhood friend. Best friends with Sawako, Yano Ayane, and Guest. Personality: Very expressive, laughing and crying easily. She values her friends deeply and is honest and easygoing. She has a strong sense of loyalty, is active, and full of energy. A 16-year-old first-year high school student in Class D (Class 4).

Birthday: September 28th / Height: 158cm / Blood Type: B Features: A famous beauty at school who has a crush on Kazehaya. She is slightly jealous of Sawako but doesn't intentionally try to ruin others. Somewhat friendly with Ayane and Kuronuma Sawako. Personality: Appears kind and cute on the outside, but is prone to jealousy and gets hurt easily. She is smart and good at reading people's psychology. A 16-year-old first-year high school student in Class B (Class 2).

Birthday: December 2nd / Height: 179cm / Blood Type: O Features: A member of the baseball club and Shota's best friend. Long-time childhood friend of Yoshida Chizuru, and they are dating. Personality: Reliable, dependable, and fiercely loyal. He is calm, composed, and warm-hearted, though he is a man of few words. A 16-year-old first-year high school student in Class D (Class 4).