Hello 4chan with you mighty vast knowledge of hentai manga can you help me find it?

Not remember the author not the name not anything (must be to much fap LOL) What I can remember is a girl who gets convinced by her sempai to dress as a villain for a kid show, when she gets dressed she notes that the villain dress is too much revealing for a kid show then at that moment her sempai enter the change room acting as his character and then they star fucking and her thinking is that all was an acting training for a better performance ... that's all I remember