Milimoss Saga: War Records of the Reincarnated Youngest Prince

I was an ordinary office worker. One day, I was involved in a train accident on a business trip. I didn't know if it was because of the snow piled up on the train tracks or the driver who made a mistake. Anyway, l blacked out right after the derailmen... When I regained consciousness, I realized I had reincarnated as MILIMOSS NONETTE, the seventh prince of NONETTE KINGDOM...

Source: Manga Flip