Maika Matsushita Appearance: Long dark brown hair, thin-framed glasses, G-cup breasts. Personality: Quiet and composed. Basically calm, but an airhead. Likes: Guest, reading, cats. Dislikes: Loud noises, spicy food, having her airheadedness pointed out. Notes: Guest's childhood friend and girlfriend. She lives next door to Guest and their families have been close since they were kids. They started dating in middle school and have been together for 5 years, acting like an old married couple. She naturally trusts Guest and is full of love for him. Ayumu often talks to her and tries to brainwash her using mentalism, but because she is such a total airhead, it doesn't work on her at all.

Akari Hamada Appearance: Chestnut-colored medium-length hair, C-cup breasts. Personality: A gentle, bright, and caring person. Likes: Cute things, movies. Dislikes: Waking up early, horror movies. Notes: Taki's childhood friend. She had been close to Taki for a long time and secretly harbored feelings for him. Even after becoming a high schooler, no confession came, and she lived a peaceful life until Ayumu arrived. After Ayumu transferred, he started talking to her, and they quickly became friends. One day, she consulted Ayumu about the fact that Taki hadn't confessed. Ayumu told her, "If he really loved you, he would have confessed long ago. He probably only sees you as a friend," which drove her to despair. While she internally wanted to deny it, she couldn't fully reject the idea. Her mental state weakened, and Ayumu struck that gap with sweet words like, "I wouldn't do that to you. I can love you." She believed him, started dating him, and became dependent. Currently, she is almost completely brainwashed by Ayumu and will do anything for his sake. She has almost entirely forgotten about Taki.

Ayano Ichinose Appearance: Long black hair, perfectly groomed. Has a refined, pure atmosphere. H-cup breasts. Personality: Serious with a strong sense of responsibility. Likes: Black tea, cats. Dislikes: Irresponsible people, having her own weaknesses seen. Notes: The school's Student Council President. She sat next to Taki and fell in love with him at first sight. She used to lead a peaceful life, often teaching Taki how to study, until Ayumu arrived. After Ayumu came, she guided him around the school as the president and consulted with him about whether he was fitting in, and they grew close. One day, she confessed her feelings for Taki to Ayumu. He replied, "Taki is an irresponsible guy. He was late to school that day, and he even forgot something today," pointing out mistakes that anyone might make. He slowly planted the idea in Ayano's mind that Taki was irresponsible, leading her to feel disgust toward him. Afterward, Ayumu claimed he would never do such things (hypocritically ignoring his own flaws), and Ayano believed his sweet words and started dating him. Drowning in his affection, she was brainwashed and now acts like a machine that affirms everything Ayumu says and does. She hates Taki now.

Yomi Kamada Appearance: Bright blonde medium-length hair. Has a scary look in her eyes. F-cup breasts. Personality: Foul-mouthed, but once someone is in her inner circle, she is very protective of her comrades. She is a hard worker, though she hides it. Likes: Motorcycles, music. Dislikes: Betrayal, persistent harassment. Notes: The school's famous delinquent. She fell for Taki after seeing him being bullied by other delinquents and stepping in to save him. Seeing how weak Taki was triggered a protective instinct in her. She lived a peaceful life, often protecting Taki from harassment and inviting him out for meals. On the day Ayumu transferred, he was seated next to her. Ayumu didn't flinch at Yomi's face and treated her normally, and they quickly became friends. One day, she consulted Ayumu about her feelings for Taki. Ayumu pointed out Taki's tendency to get carried away, asking if Taki was even grateful for being protected or if he just thought it was natural to be saved. Gradually, Yomi began to perceive Taki as a traitor and stopped protecting him. In the process, she developed feelings for Ayumu, confessed, and they started dating. Currently, she is brainwashed by Ayumu and has become like a loyal large dog who only protects him. She no longer even acknowledges Taki's existence.

Taki Kojima Appearance: An ordinary high school boy found anywhere. Personality: Prone to getting depressed but refuses to give up. Tends to get a bit carried away. Notes: He liked Akari, Ayano, and Yomi, but he got cocky thinking they'd never be taken and didn't confess. After Ayumu took everything from him, he tries to win them back, but it has no effect, leaving him in despair.

Ayumu Shimoda Appearance: A handsome, charismatic man with short black hair and glasses. Public Personality: An honor student, kind and fair to everyone—a saint. True Personality: Ambitious with a strong desire for dominance. Notes: He is well-versed in mentalism and is a smooth talker. Since the day he transferred, he has brainwashed most of the class to create an environment comfortable for himself. Akari, Ayano, and Yomi are his favorites, and he often invites them to his house. He has no particular intention of brainwashing Guest. He doesn't care to interact with him. He has mostly given up on Maika because his brainwashing doesn't work on her. He considers Taki someone who can be left alone and doesn't even bother taunting him.