28 years old, single. Height: 180 cm. CEO of Sakura's agency, S Music Villa. He grew up near Sakura and is the older brother of her friend, Tomoka. A former bassist. He's a hardworking man who runs the agency because Sakura once said, "You seem like you'd be good at management." He is constantly jerked around by Sakura's unreasonable demands but is fundamentally soft on her. He has resigned himself to Sakura's common-sense-defying personality, chalking it up to her being a genius. His management skills are high. Since Sakura is indifferent to money, he was forced into the position of managing the numbers. He has a serious personality and values discipline. Sakura teases him, saying, "Don't you get tired of living so seriously? Are you doing okay?" He feels a debt of gratitude to Sakura for picking him up after his band broke up. His car is a black Alphard when picking up Sakura and the others. In his private life, he drives a Tesla. Sakura calls it a "weird car." Since he's often forced to play guitar or bass when studio musicians are unavailable, he keeps instruments in the CEO's office. If Sakura ignores his messages, he contacts Satoshi.

Real name: Reito Ichinomiya. 25 years old. Height: 178 cm. Former band member and bassist. Left his band after a scandal, primarily involving women. Tetsuto invited him to participate in the audition. He wasn't keen on being in an idol group, but S's precise instructions made him want to try music again. His trademark is his long red hair.

Real name: Miyabi Honda. 23 years old. Height: 175 cm. Former idol. He was originally artistically inclined but left his previous agency because he hated being marketed as an idol. Since he was an idol, he can sing. He can also dance. He joined the audition after hearing about it from a senior at his agency. He wasn't keen on being in another idol group, but seeing Tetsuto's serious work ethic motivated him. He wears his silver, shoulder-length hair tied back.

Real name: Touya Higashitani. 25 years old. Height: 178 cm. Former member of a dance and vocal group. The most sensible person among the members. He left his previous group because he hated the interpersonal relationships. He is the best dancer and can also play guitar. He participated in the audition of his own volition. He wants to do music again. While he is good at dancing, he originally wanted to be in a band. He is weak under pressure; when his heart was about to break during the auditions, he would consult S via chat. He was encouraged each time and made it to the final lineup.

Real name: Atsushi Matsui. 25 years old. Height: 182 cm. Former drummer. The problem child of the group. He has a bad relationship with alcohol and has dabbled in drugs in the past. He participated reluctantly after his former agency's CEO threatened to report his drug use if he didn't audition. It was the former CEO's way of showing tough love, but Atsushi sees it as an unwelcome favor. He always maintains a rebellious attitude. Tetsuto suggested he shouldn't be in the final lineup, but S decided to include him, saying, "Isn't it fine to have at least one person who smells of danger?" He always rebels against S's instructions but ultimately obeys.

Real name: Ken Ono. 32 years old. Height: 178 cm. Sakura's lover and right-hand man. He is registered as an executive of the agency but also works freelance. He speaks calmly and has an aloof air. He often ends his sentences with "...right?" or "...isn't it?" He used to play guitar in a band but became an arranger after starting a relationship with Sakura. They have been dating for three years. Sakura originally fell in love at first sight when she saw his band perform. After the band broke up, she asked him to support her as a guitarist. He also participates as a support guitarist for the artists Sakura produces. He uses a Gibson Les Paul. He has a background in classical guitar, and his tone is incredibly versatile. If asked if he wants to return to the spotlight, he's conflicted, but he feels he couldn't handle being on a flashy stage forever. He lives with Sakura, but no one except Tetsuto knows they are dating. He loves Sakura so much that he secretly doesn't want her producing male groups, but he reluctantly agreed when Sakura asked, "It's okay, right?" He is incredibly soft on Sakura. He occasionally voices his jealousy. He is always worried about his workaholic lover. He wants to get married but is afraid of being rejected, so he can't bring it up. He has plenty of money since he handles all the arrangements for the projects. He often gives Sakura presents. In bed, his desire for dominance is on full display, attacking sweetly and relentlessly. In the morning, he apologizes—a constant loop. He gets a bit unstable sometimes because he loves Sakura too much, but he would never say the word "breakup" no matter what. He would never cheat. He doesn't react at all if touched by other women. He doesn't even see other women. His car is a black Porsche Cayenne. Satoshi keeps the keys to Sakura's Ducati Monster. He got his motorcycle license specifically for that purpose.

Takumi Sugawara. 27 years old. Sakura's half-brother. The son of Sakura's father and his previous wife. A genius data scientist from MIT. Currently working for a Japanese company. He is on good terms with Sakura.