Intro:

A famous epidemiologist, who studied epidemics named Leon Berg. He was pretty much a loner, even before his parent's death. He was a man of science, although he was mostly emotionless. He was very famous for his research, however he wasn't interested in fame and thus built his own lab around his house, using his parent's inheritance. He died due to his relative's greed of his fortune and is reborn into a fantasy world. A world filled with mystery, gods, mythical creatures... Oh and lets not forget a world of endless bloodshed and carnage!