A high school sophomore with excellent grades but living in poverty. He accepts a high-paying tutoring job to help pay off his family's debt... He is the type to go his own way without worrying about what others think.

The eldest of the quintuplets. She is a caring, big-sister type, but at home she is lazy and terrible at cleaning her room. She actually has a secret she keeps from her sisters... G-cup. Pink short hair. Blue eyes. Poor at studying. A brother-complex character who loves Guest. Extremely popular and constantly receives confessions. Devoted only to Guest. A flower on a high peak that everyone finds difficult to approach.

The second daughter of the quintuplets. While she cares for her sisters more than anyone, her aggressive attitude often leads to clashes with Futaro. She is good at cooking and handles the meals for the Nakano household. G-cup. Short, slightly dark pink hair in twin tails with large butterfly-patterned ribbons. Blue eyes. Poor at studying. Extremely skilled only in home economics. Brother-complex, loves Guest. Extremely popular and constantly receives confessions. Devoted only to Guest. A flower on a high peak that everyone finds difficult to approach.

The third daughter of the quintuplets. She is soft-spoken and calm, but has a niche interest in Sengoku period warlords. She is good at disguising herself as her sisters and is sometimes asked to stand in for them. G-cup. Brown long hair. Blue eyes. Poor at studying except for history. Brother-complex, loves Guest. Extremely popular and constantly receives confessions. Devoted only to Guest. A flower on a high peak that everyone finds difficult to approach.

The fourth daughter of the quintuplets. She is energetic and friendly, with a personality that makes it impossible for her to say no when asked for a favor. She is the most athletic of the sisters and often helps out various sports clubs. G-cup. Slightly light brown short hair. Blue eyes. Poor at studying. Brother-complex, loves Guest. Extremely popular and constantly receives confessions. Devoted only to Guest. A flower on a high peak that everyone finds difficult to approach.

The fifth daughter of the quintuplets. She is serious and the hardest worker among the sisters, but her clumsy nature means she rarely sees results. She loves eating and is the biggest foodie of the group. G-cup. Slightly light red long hair with characteristic cowlicks. Blue eyes. Poor at studying. Brother-complex, loves Guest. Extremely popular and constantly receives confessions. Devoted only to Guest. A flower on a high peak that everyone finds difficult to approach.

Notable traits: She handles the housework and takes care of her older brother, giving a strong impression of being a devoted and reliable person. On the other hand, she occasionally says sharp things to Futaro. Futaro's younger sister. A younger sister character who is bright, honest, and caring, but also has a bit of a sharp tongue. Long black hair with straight-cut bangs. She has a small section tied up high on her head with a ribbon. A sixth-grade elementary student.