I'm Shy War has ended all around the world thanks to the emergence of national superheroes. Shy (Teru Momijiyama), the hero responsible for peace in Japan, is invited as a guest to a hero show at an amusement park, however, due to her extreme shyness and poor public speaking skills, she fails to captivate the audience, except for one little boy. Soon after she leaves the stage in embarrassment, a roller coaster accident occurs and Shy is able to save everyone without fail, except for one person...