Joseon Wangjaga Migukgatda An Doraom

Due to a sudden natural disaster, Park Byung-Jun, a Korean-American lobbyist, finds himself reincarnated as Yi Kang, the second son of Emperor Gojong of the Korean Empire, at the moment of his death. Armed with his knowledge of original historical events, he travels to the United States and begins a new business venture to amass wealth!

(Source: Kakaopage, translated)