HP - Shadow Monarch!

Morou Kaind was a guardian in an order that aimed to protect a power sealed within 9 rings. He was not just a member of the order, but an heir to one of the rings, after all, only beings with the greatest affinity for each ring could be chosen to protect them. However, there was a betrayal by all 8 heirs that resulted in his death, and he awakens in a strange world in the body of a boy who has just committed suicide.