Sengoku Danshi Hana no Ran
Just days before their wedding, Crown Prince Lee Gak's fiance is found dead by the palace pond. He then called for three of his trusted retainers to help him solve this mystery and punish those who commit such a crime. But before he could get anywhere, suddenly he's become a target and was forced to leave his palace. Somehow with trying to escape alongside his retainers, Lee Gak ended up 300 years into the future (or present day Korea).