Shuuichirou has been able to sense unworldly spirits for most of his life, and it has made him sensitive in his interactions with other people. When his adoptive mother passes away, Shuuichirou decides it's time to set out on his own to find a new life. On the way, he is targeted by a malicious spirit and passes out. When he comes to, he finds himself in the home of a man named Ten. Ten is mysterious and taciturn, hiding behind a mask. But when the mask comes off, Shuuichirou is surprised to see the face of a man who has haunted his dreams for years. Who is Ten, and what is their connection to each other?