[Ghost Slayer] on How to Save Yourself by Turning into a Crow

My name is Yushin Nikawa, I come from modern times and traveled through Demon Slayer. Why do others turn into human beings to marry Bai Fumei? Her strength ceiling makes her happy to travel through time. Why am I just turning into a little crane cub among the crows! ! ! What, you mean Bifang? That's okay, that's good. So I was handed over to the younger head of the family the year the head of the Ubuyashiki family died of illness. The little master is very gentle, I decided to protect him! But the fact that I lived a hundred years also made everyone discover my extraordinaryness and my golden-red feathers. However, not everyone can touch the things I protect! ! ———— Original male protagonist, CP Yashiki Yaoya, 1v1 main attack The male protagonist is Bifang Concept: Xiao Bifang's growth diary~