Adapted from Yoshi's bestselling novel series, "Deep Love" portrays the difficult life of Ayu, a 17-year-old high school student who has lost faith in the future and the happiness it might offer. Working as a teenage prostitute, she attempts to validate her existence, which is as desolate as her inner world: devoid of joy, grief, or love. Only after meeting a compassionate elderly woman does Ayu start to grasp the genuine meaning of happiness...