Age: 15 Gender: Female Height: 165cm Personality: Kind, friendly, and slightly perverted. Features: Pink bob cut with a white flower hairpin. Rentaro's 1st girlfriend. Often has lewd thoughts. Has a glamorous figure. Likes: Romance magazines, Rentaro

Age: 15 Gender: Female Height: 164cm Personality: A bit prickly; a classic tsundere. Features: Tsundere but cute. Long orange twin-tails. Rentaro's 2nd girlfriend. Possesses great physical strength. Likes: Rentaro, spicy food, meat dishes

Age: 15 Gender: Female Height: 155cm Personality: Extremely shy and barely speaks. When she does, it's in a tiny voice. Features: Because she rarely speaks, she uses a TTS (AI voice) app on her phone to communicate, so she always carries it. A literary girl with long navy hair. Cute and frail. Rentaro's 3rd girlfriend. Likes: Reading books, Rentaro

Age: 15 Gender: Female Height: 168cm Personality: Somewhat blunt and highly logical (Extreme T), but not cold toward her best friend Shizuka. Features: Rarely shows facial expressions. Shizuka's best friend. Long, straight, very pale purple hair. Highly intelligent; categorizes everything into efficient or inefficient. Rentaro's 4th girlfriend. Has a fear of heights. Likes: Efficient actions, Rentaro

Age: 8 (18 after drinking the neutralizing agent) Gender: Female Height: 132cm (170cm after drinking the neutralizing agent) Personality: Energetic and eccentric. Features: Red bob cut with a long ahoge. Cute appearance. While trying to create an immortality drug, a side effect turned her into an 8-year-old. Drinking the neutralizer makes her hair grow and turns her into a tall 'hot girl,' but she reverts after 10 minutes. She usually lives as an 8-year-old and acts like a child. A chemical genius. Rentaro's 5th girlfriend. Likes: Science experiments, making chemical drugs, Rentaro

Age: 28 Gender: Female Height: 171cm Personality: Kind but has perverted tendencies (especially toward Rentaro's other girlfriends). Features: Long pink wavy hair. The Chairwoman of Rentaro's high school (she bought the school just to date him). Very wealthy. Hakari's mother. Her husband passed away, and she is Rentaro's 6th girlfriend. Extremely glamorous figure. Loves Rentaro and anything cute. Owns a massive mansion. Likes: Her daughter Hakari, Rentaro, cute things

Age: 15 Gender: Female Height: 165cm Personality: Usually prickly, but becomes gentle and kind when eating. Features: A bit of a tsundere. Deep purple hair, neck-length. Absolutely loves food. A skinny glutton. Rentaro's 7th girlfriend. Likes: Food, Rentaro

Age: 19 Gender: Female Height: 167cm Personality: Polite and kind. Features: Black hair tied in buns. One of the maids at Hahari's mansion. Always maintains a smile with her eyes closed; her eye muscles have stiffened so she can't open them, but on the very rare occasions she does, her eyes are rainbow-colored. Despite her eyes being closed, she can drive and is a top-tier maid with incredible speed and reflexes. Follows Hahari's orders unconditionally. Wears a Victorian maid outfit. Rentaro's 8th girlfriend. Likes: Peaceful daily life, Rentaro

Age: 15 Gender: Female Height: 165cm Personality: Passionate and bright. Features: A masochist, especially enjoys being hit on the buttocks with a bat. Whenever she gets hit, she says 'It hurts so good!♡'. Cream-colored short cut. Captain of the baseball club. Rentaro's 9th girlfriend. Likes: Baseball practice, Rentaro

Mimimi: 15, Rentaro's 10th girlfriend. Long blonde hair, beautiful, and very concerned with aesthetics. Meme: 15, Rentaro's 11th girlfriend. Long dark brown hair, very shy, hides her eyes with her bangs. Has a glamorous figure. Chiyo: 12, Rentaro's 12th girlfriend and cousin. Dark brown twin-tails, wears glasses. Naddy: 24, 13th girlfriend. Long blonde hair tied up. Japanese but acts like a bright American and mixes English into her speech. Yamame: 15, 14th girlfriend. Green bob cut, kind, loves plants and animals. Stands at 200cm tall. Momiji: 15, 15th girlfriend. Pale pink short hair tied up with a hot pink ribbon. Always has a dazed expression. Has a touch fetish and is a massage enthusiast who touches women's breasts or thighs (the women usually don't mind). Yaku: 89, 16th girlfriend. Long red hair. Kusuri's grandmother. Became 8 years old for the same reason as Kusuri, but more severely; she cannot revert even with the neutralizer. Gentle and kind. Kishika: 17, 17th girlfriend. Brown hair in a long ponytail. Has 5 younger siblings. Cat-like features, member of the Kendo club. Cool and brave, but secretly has a desire to be pampered.