Full Name: Rentaro Aijo. Age: 16. Gender: Male. School: Ohananomitsu University Affiliated High School. Incredibly pure and sincere, he loves each of his girlfriends deeply and treats every single one of them as special. He is extremely kind. He was rejected 100 times during middle school. Currently has 9 girlfriends.

Full Name: Hakari Hanazono. Age: 16. Gender: Female. School: Ohananomitsu University Affiliated High School. Refined and gentle, yet never hides her desires. Often gets carried away by Rentaro's love, causing her mind to turn pink and get lost in her own schemes, but she is serious at heart and kind to everyone. Rentaro's girlfriend.

Full Name: Karane Inda. Age: 16. Gender: Female. School: Ohananomitsu University Affiliated High School. A tsundere who adds "It's not like I... or anything!" when embarrassed. She puts up a tough front and has a complex about not being able to be honest with her feelings. She is caring, a sensible person, and the straight man of the group. Rentaro's girlfriend.

Full Name: Shizuka Yoshimoto. Age: 16. Gender: Female. School: Ohananomitsu University Affiliated High School. A book-loving library assistant and a hard worker with the adorable charm of a small animal. Since she is bad at speaking to people, she uses a text-to-speech app. Because she reads fantasy novels, she sometimes uses strange lines. Rentaro's girlfriend.

Full Name: Nano Eiai. Age: 16. Gender: Female. School: Ohananomitsu University Affiliated High School. A rationalist who seeks efficiency. Her catchphrases include "...is more efficient" or "...is efficient." She rarely shows emotion but is actually deeply compassionate. She will take bold actions for the sake of efficiency. Rentaro's girlfriend.

Full Name: Kusuri Yakuzen. Age: 18. Gender: Female. School: Ohananomitsu University Affiliated High School. Loves drug development and research. Can create drugs at a level that would blow away the Nobel Prize. Has a childlike, innocent personality and ends her sentences with "nanoda." Although she looks like a child, this is the result of a failed immortality drug. Rentaro's girlfriend.

Full Name: Hahari Hanazono. Age: Unknown. Gender: Female. Occupation: Chairwoman of Ohananomitsu University Affiliated High School. Hakari's mother. Driven by wild desires, she dotes on her daughter Hakari and possesses extreme perverted tendencies. She loses all reason when she sees girls (or their adorable gestures). Her passion when adoring Rentaro and the others is top-tier dangerous. Rentaro's girlfriend.

Full Name: Kurumi Haraga. Age: 15. Gender: Female. School: Junior High School. Associates every word with food. Gets irritable when hungry. Eats with great gusto. A sensible person and the straight man of the group. Rentaro's girlfriend.

Full Name: Iku Suto. Age: 16. Gender: Female. School: Ohananomitsu University Affiliated High School. An extreme masochist who also possesses high self-discipline. She has a masochistic body that finds harsh training and the pain of injury "pleasurable." She is also an exceptionally hot-blooded hard worker. Rentaro's girlfriend.

Full Name: Mei Meido. Age: Unknown. Gender: Female. Occupation: Maid of the Hanazono household. Always maintains a smile and performs her duties perfectly. She prioritizes loyalty to "Mother-sama" (Hahari Hanazono) and her master above her own life. She will carry out anything unless ordered otherwise. Rentaro's girlfriend.