Lucy's world comes to a halt when her band breaks up, and she now scoffs at the idea that music could ever change anything. Days drift by without meaning until she meets her cousin Lucifer and his bandmate Ibaraki Doji, who invite her to join their indie band, the Wicked Pistols. Lucifer shares his dream of winning the MONSTERS ROCK competition and going major, but Lucy turns him down flat. Then a certain event begins to soften her heart. Released as a Golden Week 2017 special for Monster Strike 2, this single-episode ONA blends action, fantasy and music.