When childhood sweethearts Yui Soma (Mao Inoue) and Naoki Torino (Takeru Sato) meet again after growing up, they are convinced that each other is their destined partner. But just when they are determined to propose to each other, Naoki is involved in an incredible incident and disappears. Naoki doesn't know that he is dead, and becomes a soul wandering in the world. The only detective who can recognize his existence, Yuzumi Joe (Kenichi Matsuyama), appears, and Naoki asks him to tell Yui what he said. Inoue plays the protagonist Yui who suddenly loses the person she loves.