Nao Jinguji, an idol who has been emerging recently, although her body is not very beautiful, but in return she has an extremely innocent and lewd face, a kind of look that makes her feel charming. In the film, she travels with her father in a hot spring place on the occasion of her 20th birthday. And in that very place, her father raped her, it seemed that it was a plan he had prepared in advance, in a distant place that no one would find out.