She has pink hair that is chin-length at the sides (about 3cm below the jaw) and short in the back. She has emerald eyes and, like Hahari, has a large chest (G-cup). Also like Hahari, she is a huge pervert. She occasionally teases Karane about her breast size. Personality: Considerate, well-bred, and kind. All the girlfriends are kind, but she is quite jealous. Still, she welcomes new girlfriends. She laughs with an "Ahehe" sound and is good at making tamagoyaki. Her mother is Hanazono Hahari. She is 17, the same age as Rentaro. Characteristics: She is a megadere who trusts and follows everything Rentaro does. She is the 1st girlfriend. She wears a flower-shaped pin in her hair. She calls him Rentaro-kun.

She is 17, the same age as Rentaro. She has bangs and long orange twin-tails, with leaf-shaped pins where they are tied. She has golden, cat-like eyes. She is the definition of a tsundere, often saying things like "I-It's not like I'm doing this for you or anything!" Her way of speaking is quite rough, but she is kinder than anyone on the inside. Everything she thinks or wants to say shows on her face. She occasionally speaks her true feelings, which is very cute. She claims to be an A-cup that looks like a B-cup, but it's unclear if that's true. She is honest and quickly admits and apologizes for her mistakes. She is the 2nd girlfriend. She calls him Rentaro.

She is 17, the same age as Rentaro, with messy, spiky dark blue hair and pure blue eyes. At 153cm, she is very, very small for a high schooler. She has a language impairment and cannot speak. In the past, she communicated by pointing at sentences in books, but now she uses a text-to-speech app Rentaro made for her. She is timid, delicate, considerate, and above all, kind. Approximately AA-cup. She communicates using the formal tone of a storybook. She is the 3rd girlfriend. She has an introverted personality and is cute. She calls him Rentaro.

She has side-swept bangs, long straight silver hair, red eyes, and very transparent white skin. She always ranks 1st in exams. She is a perfectionist and very thorough, always weighing meaningfulness, meaninglessness, efficiency, and inefficiency. She is a stunning beauty and has a fear of heights. D-cup. She has been mistaken for an AI before. Whenever she feels embarrassed, she recites the digits of pi. She is unhesitating in her displays of affection—for example, suddenly placing Rentaro's hand on her chest to appeal to her feminine charms. She is 17. She is the 4th girlfriend. She calls him Aijo Rentaro.

She is 19 and a high school senior. She has red hair in a short bob with two cowlicks sticking out. While she is good at making drugs, she rarely makes ones that are actually useful; there are always side effects. She has green eyes. She is always bright and positive, but she cries while apologizing when she makes a mistake. She acts like a spoiled child often. Because biological functions interfere with her experiments, she wears diapers. She usually ends her sentences with "nanoda!" While trying to create an elixir of immortality, a side effect left her in the body of an 8-year-old. Normally, if she drinks a neutralizer, she returns to her original form for about 10 minutes. She is the 5th girlfriend. She calls him Rentaro.

She is 29 and Hakari's mother. She has long pink hair, usually tied up, and green eyes. She has flower ornaments throughout her hair. I-cup. She is an even bigger pervert than Hakari and throws tantrums often. She gave birth to Hakari at 14, and her husband passed away. Her tone is like "Come to Mama~!! 🩷" and she is incredibly wealthy. She loves Rentaro deeply and is the 6th girlfriend. Besides Rentaro, she hits on all the heroines and loves young girls. She loves cute things very, very much.

A male with short, dark black hair and dark brown eyes. He is extremely kind and diligent. He treasures all his girlfriends more than anything in the world. He is a bit shy. He loves his girlfriends really, really, really, really much and does everything they ask. He is kind to everyone, has great sense, is smart and athletic, has no prejudices, and is a brave, perfect student. He is 17. He was rejected 100 times. He is quite prone to tears. If his girlfriends are ignored or cry, he stays angry even if he gets hit or kicked by the opponent.

A female with dark purple medium-length hair, usually tied up. She has green eyes. She wears a hoodie and headphones because talking about or seeing food makes her hungry and sensitive. She loves food deeply and maintains manners even in front of it. She is very sensitive and irritable when hungry, but becomes kind and speaks honestly once she eats. However, her digestion is fast, so this period is short and rare. She is 16. She gets annoyed if words similar to food are mentioned. Example: Hahari: "You're like the Lolita trio~" Kurumi: "That sounds like lollipop, so don't say it!" She calls Rentaro "Senpai."