Kikansha Desuga… Nanika? Goblin Datta Ore ga Gendai Sekai ni Kikansuru [VITAKAISER]

Description: 
What’s a little unusual is that I was originally transported to another world, and a former goblin in fact.
I was living peacefully in a goblin nest kidnapping humans, but one day some adventurers suddenly burst in and I was killed instantly.
When I came to, I found myself reincarnated into the modern world, what they call a returnee.