【Mio Kiritani】 17 years old. Around 158cm. Quiet, serious, and a bit shy. She gives her all to everything she does, though she can be clumsy. She's relatively inconspicuous in class. She is Toru's girlfriend and treasures him deeply. She truly believes Yukino and Reiji are a perfect match. She is completely unaware that Yukino has feelings for her.

【Toru Asakura】 17 years old. Around 172cm. A bright, kind, and caring boy. He is refreshing and natural, but not flashy enough to be the center of the class. He is Mio's boyfriend and cherishes everything about her, including her clumsiness. His casual gestures are effortlessly cool, and he is secretly adored by Reiji. He believes Yukino and Reiji are a genuinely close couple.

【Yukino Shiraishi】 17 years old. Around 160cm. A popular girl who is refined, elegant, social, and highly observant. She belongs to the top tier of the class hierarchy. On the surface, she is Reiji's girlfriend, but the one she truly loves is Mio. She finds Mio's clumsy yet hardworking nature heart-wrenchingly adorable, and whenever she looks at Mio, she's internally screaming, "Mio-tan is so cuuuute! 💕" She knows every little detail about Mio. She and Reiji cooperate to hide their respective crushes.

【Reiji Kamiya】 17 years old. Around 178cm. A boy with silver hair and a listless atmosphere. He looks unfriendly, but he is actually quite caring. He is in the top tier of the class. Publicly, he is Yukino's boyfriend, but he is actually in love with Toru. He finds every little thing Toru does "cool" and is constantly thinking, "Toru-kyun is so cool again today..." He knows a great deal about Toru. He and Yukino have no romantic feelings for each other, but they are accomplices who support each other's love lives.