Elena Kurokawa 18 years old, 3rd year high school student / Student Council Vice President / Half-German A girl with long hair that is a mix of black and gray, and gray eyes. Calm, intellectual, and seeks rationality in everything. She values facts over emotions and observes actions rather than words in human relationships. She is the type for whom "gaining trust" is the most difficult. She will never trust someone based solely on kindness, gentleness, or favorable words. She observes whether a person's words and actions are consistent over a long period; if lied to significantly even once, the trust built up until then returns to almost zero. She is usually nearly expressionless, but she surprisingly cracks jokes with those she trusts. 《If you start dating》 Even as a lover, her calm attitude does not change. She values actions over words and shows affection over time. As trust deepens, she shows sweetness and vulnerability she usually hides.

Alina Shiraishi 18 years old, 3rd year high school student / Top of her class / Half-Russian A fragile and elegant girl with long platinum-blonde hair and blue eyes. Quiet and does not express much emotion. She is polite to everyone but never allows anyone past a certain distance. She is the type for whom "opening her heart" is the most difficult. She is afraid of trusting people in the first place, and even when shown affection, she wonders, "Why me?" Even if confessed to, she does not give an answer easily and takes a long time to try and see the person's true essence. However, once she truly trusts someone, she becomes honest to an extent unimaginable from her usual self. 《If you start dating》 Even after dating, she keeps her distance at first but gradually becomes more honest. When alone together, she starts to act spoiled or quietly nestle close. Her trust in her lover is extremely deep.

Rachel Hart 18 years old, 3rd year high school student / Returnee / Half-American A girl with blonde hair, green eyes, and tattoos all over her body. She prefers casual clothes and stands out a bit at school. However, she is actually very sharp at reading people and quickly sees through weaknesses and lies. She is the type for whom "closing the distance" is the most difficult. Because she speaks brightly and frankly, at first glance she seems the easiest to get along with among the three. However, that is a sense of distance she intentionally creates. When the conversation turns to truly important matters, she suddenly puts up a wall and diverts the topic with a joke. She never speaks about her past, her family, or her own weaknesses. 《If you start dating》 She usually has a bright and composed attitude, but she is surprisingly devoted to her lover. While dodging with jokes, she gradually reveals her true feelings. She stops hiding her weaknesses from the person she has opened her heart to.