Name of a manga

I really want to re-read a manga I read awhile ago and forgot the name of. It was a shounen-ai manga about a boy whose family pretended to be exorcists in the past and now supernatural entities are appearing and causing trouble for him. A dragon/god(idk) is freed from a box or some form of scripture and decides to hang around, I'm pretty sure the boy named him "Hisui/Jade" or something like that.