From NOIR:

This is the story of two siblings, Joo-won and Hee-won, and one man determined to take Hee-won's heart. Both Joo-won and Hee-won feel isolated after their parents separate due to infidelity and remarriage, placing both of them in new families. However, Hee-won's new step-brother, In-hyuk, notices Hee-won's suffering. Is he determined to take care of her, or is there something more?

From Yen Press:

Monarchy ended long ago in Korea, but there are still other countries with Kings, Queens, princes and princesses. What if Korea had continued monarchism? What if all the beautiful palaces which are now only historical relics were actually filled with people? What if the glamorous royal family still maintained the palace customs? Welcome to a world where Korea still has the royal family living their lives! But for Che-Kyung, a high-school girl, this is a tragedy, since she has to marry the prince who turns out to be a total jerk!

From manhwa101
A young very talented hairstylist Hyunkang Kim, with an obsession for scissors, is one day recruited by an old man on the street. He later discovers that the gentleman in question was once the director of best hair salon in Seoul!

Accepting the offer thus begins his story. Challenges, friendship, overcoming past traumas, and delirious situations now fill his life! And there might even be time for some romance... ?

Meedan Kang is the last living descendant of a powerful witch that placed a curse on the Montrose family many years ago. She's desperate to live a normal life but suddenly two handsome men, with ties to the curse, enter her life with different plans for her. Their presence forces Meedan to confront her family's past and the abilities within herself that she has resisted for so long. As the three of them try to face the curse that binds them all together, a love triangle begins to complicate all of their plans.