a man who wanted to become a famous pianist. He became obsessed with practicing the piano. When he suggested Fuzuki should rest, he ended their relationship. Tanaka is Fuzuki's maid. She also has a crush on Wakaoji and is jealous of Oshige, mistaking her to be Wakaōji's fiancée, but concedes when she believes the two are in love. Wakaōji is Mitsuki's doctor. He had played the keyboard in her father's band, Route:L, where he was also nicknamed the "Prince of Route:L" by his fans. Due to his connection with Mitsuki's parents, as well as witnessing Takuto committing suicide after removing the tumor in his vocal cords, Wakaōji becomes protective of her. Mitsuki learns that Wakaoji loved her mother because of a letter he thought she had written him, but Wakaōji falls in love with Ōshige when he discovers the letter was from her. In a side story, he asks Ōshige to marry him and she accepts. Ōshige is Fullmoon's 28-year-old manager and a former singer under the stage name . Ōshige is in love with Wakaōji, having been smitten with him since his days in Route:L, but she feels she is too old and unworthy of true love with a man. To cope with this despair as well as with the pressures of her job, she often loses herself in a bottle of sake and also sleeps with her boss out of loneliness despite his being married. At the end of the manga, Wakaōji discovers Ōshige had written an encouraging letter to him in the past, and they begin a relationship, eventually getting engaged. "Ōshige" is a combination of Tanemura's editors names. She created Ōshige as a heavy drinker because her editors like to drink. Madoka Wakamatsu, whose real name is , is Fullmoon's rival in the music industry and befriends 12-year-old Mitsuki at the same time. Despite being talented, Madoka is constantly upstaged by Fullmoon because she initially lacks the heart Mitsuki gives her songs. Additionally, Madoka is insecure because she had plastic surgery to make herself beautiful as a celebrity, and thus was disowned by her family. Madoka has a small pig called who worships her. Although Madoka sometimes takes out her anger on Gu-chan, she really loves him. Aoi is Mitsuki's deceased father who was also the guitarist and songwriter for the band Route:L. He acted as a father figure for the orphaned Takuto. Tanemura states that