A long time ago i read a manga,manhwa,... cant remember the name but i remember something, and is like that:

A Boy who uses a gun, try to find the Holy Graal or Jesus Blood, cant remember correctly, the boy was hired by a archeologist, when the boy found the holy graal, a immortal witch try to kill him, and he in a accident, drink the liquid in the holy graal and become imortal. After some time, he discover that the archeologist who hired him was killed, then he tries to find the archeologist daughter, hoping that she can explain what really are the thing that he was hired to find

I Think the history is like that, if someone read this and remember something, i will become happy if tell me the name =)

Sry if my english was bad, =/

It's Raiders

thx =)