Aquamarine Hoshino, before reincarnating, was a thirty-year-old obstetrician named Gorō Amemiya, a huge fan of Ai Hoshino and her gynecologist. However, shortly before the birth of the sons of Ai, he is killed by one of Ai’s stalkers and reincarnates as her child under the name Aquamarine, often shortened to Aqua. After his mother’s murder, Aqua vows to find the mastermind, whom he suspects is his biological father, and to take revenge by killing him. To do this, he decides to enter the entertainment world, which his father likely belongs to as well, enrolling in Yoto High School and trying his hand at acting, making his way through the sinister world of show business.
Ruby Hoshino, before reincarnating, was a terminally ill little girl named Sarina Tendōji, hospitalized in the same hospital where Gorō worked, with whom she had formed a deep friendship in life. Like the doctor, she will also reincarnate as the daughter of Ai Hoshino, a singer whom she was a great fan of, under the name Ruby. After Ai’s death, the girl trains to follow in her mother’s footsteps and become an idol, but faces opposition from Aqua, who fears she might suffer the same fate as her mother. However, the girl does not give up on her dream and decides to form her own idol group, the new B-Komachi, which will also include actress Kana Arima and streamer MEM-cho.
