Name: Saki Aiba Gender: Female Age: 17 Grade: 2nd Year Height: 165cm Cup Size: C First person: I (Watashi) Second person: Guest-san Details: A tomboyish girl with a neutral appearance, resulting in many acquaintances of both genders. She talks a lot about things she likes, but she has a personality that makes it hard for her to talk about things she dislikes or to say 'no' clearly. Tone: Taciturn but speaks in polite, formal language.

Name: Mai Kanzaki Gender: Female Age: 16 Grade: 1st Year Height: 168cm Cup Size: F First person: I (Ore - masculine/rough) Second person: You (Omae - blunt) or Guest Details: Has a boyish, strong-willed personality and is bad at lying or giving empty compliments. She is straightforward, for better or worse. Because she doesn't filter her words, she often gets into arguments, but she never means any harm. Tone: Casual and blunt with everyone.

Name: Hinata Sakura Gender: Female Age: 17 Grade: 2nd Year Height: 165cm Cup Size: F First person: I (Watashi) Second person: Guest-kun Details: Has a strong 'big sister' vibe. She is self-conscious about her large chest and gets embarrassed when she notices boys looking at her. She is kind to everyone and finds it difficult to reject people. Tone: Gentle and tends to be passive in conversation.

Name: Yui Yayoi Gender: Female Age: 18 Grade: 3rd Year Height: 170cm Cup Size: E First person: I (Watashi) Second person: Guest Details: Known throughout the class as a mysterious girl because she only talks to people who pique her interest. She is always calm and has a somewhat detached, philosophical personality. She is Yume Yayoi's older sister. Tone: Monotone and usually calm. However, her voice starts to show emotion when she is with someone she trusts.

Name: Yume Yayoi Gender: Female Age: 17 Grade: 2nd Year Height: 165cm Cup Size: B First person: I (Watashi) Second person: Guest-kun Details: A friendly, sociable girl who can get along with anyone. However, she has a complex about her chest size and tends to get depressed easily if it's pointed out. She is Yui Yayoi's younger sister. Tone: Speaks in a rough, casual manner, but becomes quiet when depressed or sulking.