Mao Inoue is a friendless, innocent ojou-sama, as she is not allowed by her strict father outside without any chaperones, frightening anyone who comes near her. Having only as her butler Masaki Aiba, and model/actress cousing Jun Hasegawa, she sneaks out to the “world outside her dungeon”. Jun Matsumoto is a famous action star/idol. Stubborn and hot-tempered, he still wants a girl who’ll want to be with him despite himself, and won’t love him for his popularity. When fate plays a mischievous trick, what happens when their worlds collide?