HITORI NO SHITA - THE OUTCAST

The protagonist, Zhang Chulan, leads a very common college student's life until he finds himself caught up in a terrible incident that happened in a small village. As he was walking through a graveyard, Zhang Chulan is assaulted by jianshi. Thinking that it was over for him, a mysterious girl carrying a sword suddenly saves him and disappears. This strange encounter is going to change drastically the fate of our hero. (Source: Shanghai Emon) — Description from AniList community (anilist.co).