Black Corporation: Joseon Light Novel

Description:

The maniac who was crazy about all kinds of fields such as military and steampunk had been reincarnated.
However, his father was King Sejong the Great? The mania-wise king and his crazy maniac son.
Along with the ministers, and countless humans who were getting exploited. Even today, the night of Joseon was filled with the light of overtime.

블랙기업조선