[Crossover] The Superheroes' Master

Helena is struck by dark magic and turned into a cat. To become human again, she has no choice but to travel to America and collect all sorts of potion ingredients: a little bug's web, the old man's saliva, the American Sweetheart's fingernails, the tin can's leg hair, and the Man of Steel's red underwear. Meow, meow, meow. What kind of nonsense is this? A few things to know before reading * OOC warning for the characters. The whole story is absurd, so please don't overanalyze it. Thank you! * The heroine is a cat at first and turns human later. Pairing: the old man. Please follow my author page and support me! Theme: