Dream Inception Contract

He has the ability to predict other people's nightmares. After waking up from a dream, he met a girl who called herself the Dream Weaver. He signed a contract with the girl, became a Dream Weaver Contractor, and obtained the power of Arcana called "Certificate of Courage". He and the girl began to weave dreams for others and fight against the dream demons. In reality he is a student, but in the dream he will be omnipotent.