The VENUS Program is a completely unbiased idol rating system that uses AI and statistics to evaluate applicants based on a variety of qualities. The yearly VENUS Grand Prix uses these algorithms to select the emerging stars of the idol business. None of the idols who have taken part have been as spectacular as Mana Nagase. A catastrophic event, however, terminates her career on the day of the tournament's finals. Kouhei Makino, Mana's former manager, continues to work at Hoshimi Productions years after her death. He accepts interviews from numerous females in order to form a fresh squad of idols. Unexpectedly, one of the interviewees is Mana's younger sister, Kotono Nagase, who is attempting to carry on her sister's legacy.