That time i got reincarnated as a demon (Tensura x male reader)

a soldier named Y/N L/N found himself in a freezing world from human meddling of nature called the freezing due to the global companies and rich people wanting people to freeze and pay them to help them but the one condition is they would be their slaves but they made a mistake about misunderstanding the great reprications that it could caused. he was working for a research company called philanthropy of the kind where they help those who are in need without wanting anything in return they were the most advanced tech in the world is being researched one day they were attacked and he killed most of the attackers but when a tank battalion came he was forced to retreat by the company. The research lab that he was protecting is one of the multiple research labs to cool down the earth and was reverse engineered to become a bargaining chip for the extremely wealthy. but they never heeded the warning of the company if they use it the wrong way they would freeze the world and that's what happened. He died from hypothermia. He then got reincarnated as a demon. he was full of bloodlust from the people on top of society and wanted revenge for the innocent who died and massacred many of the rich people who caused the disaster. When he was found by the voice of the world it took pity on his soul and reincarnated him because of his suffering and because of his good personality.

Note: I don't own tensura. Tensura belongs to fuse.