Extra Girl

"Shion was murdered. And I lost half of myself..." Shion and Kuon are twin sisters. One day, Shion, who was an idol, suddenly commits suicide. However, Kuon instinctively feels that Shion was "murdered," and infiltrates the entertainment industry as an "extra" to find the real killer. With the help of Ryuuto, a young actor who was Shion's lover, she investigates the truth, and the dark side of the entertainment industry is revealed one after another. Along with the mysterious keyword "Black Onyx," a certain "drug" is involved. And the relationship between Ryuuto and Kuon also gradually changes...!? (Source: Shogakukan, translated)