Do you know this manga?

I barely remember this but this is a bl. Mc was being sacrificed to a god? But was unexpectedly saved. That savior turns out to be the god. Im not sure if it was scales or what but there was a rumor that the god's scales can make you an immortal if grinded. So mc ate/drank it so that he could live a long life with the god. The art was really good and the start was confusing cuz mc lowkey looks like a girl with extremely short hair.