Well I don't remember much. The MC goes on an hunting trip from school. Some problem happens so the hunt gets cancelled. MC sneaks and kill some powerful enemy there he meets a dark elf assassin. One of the harem member/potential member is royalty/nobel. Sorry if this is too less information. I read the novel long ago so the info may be slightly off. So anything you find similar please give me the name. Thanks to everyone for reading this post and also for helping if possible.
https://www.novelupdates.com/series/so-what-if-its-an-rpg-world/ Not reincarnation, just worldhopping. Fits the rest of the story though