Jung Byung hee (GO) always imagined Jaejin, his childhood crush, to be his wife.. but not like this.

Jaejin's boyfriend leaves her after finding out that she is pregnant. Her mother is coming to visit her and the baby's father.. only problem  is, that the father ran away. The only solution she could find was to ask her good friend GO to pretend to be her boyfriend and soon to be husband until Jaejin could find the courage to tell her mother the truth. But there is a shadow looming over their heads, Jaejin's neglect of this shadow will result in her losing everything she had worked for. Will Byunghee help her through this, even though he is just the fake fiance?