Isekai Revolution Princess

A Japaneese researcher that worked on warp drive's crucial element - generation of Negative Matter - is dead because of his work, dooming entire planet. To his rescue - and our world's - comes slavic god Veles, the god of wealth and death. He wants him to help save one world... By letting him access it's control... To fix a family member's project. He accepts under one condition... He is to be reborn as a female. Veles, who was disgusted by the idea, agrees and ressurects him in the world of fantasy, industrial revolution where machines, magic and fantastical animals coexist without issue.