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".
Premarital Relationship is a completed manhwa by Tamlin (탐린). It blends romance, comedy and slice of life. You can read all 80 available chapters of Premarital Relationship online for free on MangaPulse; the newest is Chapter 80, added 2020-07-31. The series is finished, so you can read it from start to end in one go.