A story about a demon hunter named Rano who is trying to find his sister. Along the way he finds a person who has the same teeth structures as demons yet is not affected by sunlight. This person, Lessa, seems to remember who Rano is, but Rano does not remember who he is. Rano only dreams of this person; what are the connections between these two?

Note: Contains two prologues are two epilogue chapters.