Miku, who has been living modestly with her stepfather since her mother passed away. One day, she has a disagreement with her stepfather about her future. To Miku, who dreams of "going to Tokyo and becoming a cosplay idol!", her stepfather advises, "Stop dreaming. The outside world is harsh." The argument reaches a stalemate, and her stepfather, unable to bear seeing Miku even decide to run away from home, drags her into the storehouse, saying, "Come over here." "I'll teach you the fear of adults..."