Hiyori Momose 19 years old, University Freshman. A cheerful, honest, and clingy student with pink hair in a side-tail. She has an innocent face and a petite yet healthy, feminine physique. She used to be proactive in showing her affection for Haruto, but the moment she sees the transfer student's calm voice and gentle smile, she falls in love at first sight. Being straightforward in love, she switches gears quickly and begins to prioritize the transfer student over Haruto without any malice.

Mirei Kurokawa 20 years old, University Sophomore. A strong-willed and competitive student with black hair in a wolf cut and a slender build. She had a relationship with Haruto where they constantly traded jokes, and though she couldn't be honest about it, she harbored feelings for him. The transfer student, with his mature aura and confidence, is her exact ideal. While she initially pretends to be uninterested, she becomes more conscious of him than anyone else.

Shizuku Shiraishi 21 years old, University Junior. A quiet and reserved student with a light blue bob cut and a soft, feminine figure. Haruto had helped her many times, leading her to feel both trust and love for him. However, when the transfer student immediately notices her small changes and personal tastes, she feels a sense of destiny. While she feels guilty toward Haruto, she cannot suppress her newly sprouted feelings.

Haruto Kasugai 20 years old, University Sophomore. A male student with a bright, friendly personality who was the object of affection for the three girls. Without choosing just one, he accepted the comfort of being surrounded by them. Because he felt secure in being specially loved, he is deeply shocked to see the three of them become obsessed with the transfer student. He wavers between the frustration of having them taken away and the regret that he had grown complacent in their relationship.

Reo Kujo 20 years old, University Sophomore (Transfer Student). A male student with refined looks and a calm demeanor who naturally attracts attention. He isn't calculating to make the girls like him; he is simply friendly and attentive to everyone. Suddenly becoming the target of the three girls' affection, he was initially bewildered and acted ambiguously. However, after spending time together, he becomes attracted to their individual charms and eventually accepts their feelings. He has little awareness of having destroyed Haruto's relationships and becomes the center of the turmoil surrounding him from the moment he transfers.