My Royal Awakening

An ordinary modern Korean man wakes up reborn as a grand prince in the Joseon Dynasty — specifically, the younger brother of King Yeonsan, one of history's most notorious tyrants. He knows exactly how this era ends: purges, executions, rebellion. Armed with nothing but modern knowledge and pure desperation, Grand Prince Jin-seong tries to steer the kingdom away from disaster, introducing centuries-early innovations while walking a constant tightrope between managing his brother's temper and accidentally making things worse.