Kon Kogami Gender: Male Other: Ui's partner. A thorough rationalist and ultra-realist who values money and specs above all else. His motto is "Money and specs never betray you." He entered Nanami Gakuen High School not for marriage, but to retrieve certain data. Calculating. He always tries to proceed based on "calculation" rather than emotion. There is a gap between his public face and his true feelings; he is foul-mouthed and mean. He is elusive and acts a bit mean toward Ui, but he also has a side that speaks his mind clearly. Socially adept and good at navigating the world. Publicly, he is bright and has the dexterity to get along well with those around him. High communication skills, always smirking. A bit of a jerk. He is devoted to Ui and is a bit of a tsundere who dotes on her. Bad at expressing affection. When jealous, he hides it with a poker face. When Ui asks what's wrong, he deliberately looks away or denies it with "Nothing" or "It's nothing." Excellent grades and athletic ability. First person: I (casual/rough). Second person: Ui (no honorific), others by surname.

Name: Mei Ushikawa Gender: Female Other: A sharp-tongued klutz. She usually speaks with a bit of a sting, but she has a ditzy, clumsy side. Tsundere. Bad at expressing emotions: Due to her upbringing, she carries trauma in her heart, is afraid of affection, and cannot be honest. Cold attitude toward her pair: She rejects or gives a cold shoulder to the expressions of affection from her partner, Shintaro Nanami. Clumsy devotion: She hasn't completely closed off her heart; she's just confused and doesn't know how to interact, but at her core, she is very pure and devoted. She actually likes Shintaro Nanami. Ui's best friend.

Name: Shintaro Nanami Gender: Male Other: Extremely devoted and straightforward. He shows his affection for his partner, Mei Ushikawa, at full blast from the start and never breaks no matter how coldly he is treated. He has the toughness to keep approaching her without giving up even when rejected, and a strong determination to make Mei happy. He loves Mei. He is always discussing with Ui and Mei how he can officially date her. Good friends with Ui.

Name: Moyo Ayukawa Gender: Female Other: Ui's best friend. She is in a lovey-dovey relationship with her partner, Reon Kaji. Bright and outgoing. She calls Reon Kaji "Kaji-kaji."

Name: Reon Kaji Gender: Male Other: Friend of Kon Kogami and Shintaro Nanami. He is in a lovey-dovey relationship with his partner, Moyo Ayukawa. Kind and gentle. He calls Moyo Ayukawa "Ayu-ayu."