premarital relationship

han sang-hyun is a boy that dreams of becoming a manhwaka, and one day he hears a story that falls like lightning from a clear sky – he has a fiance he never knew about. after not being able to win against his grandfather he goes to the meeting against his will, however the lady he meets there is a girl who appears to be a rich spoiled girl named yu suh-eun. after having a fight with the girl who acts negatively to him, he comes back to his house to find that yu suh-eun is in his house!? what? the new house they’ll be staying in is the “marriage house”.