You are Kim Dokja,

you and Yoo yoonghyuk met at a rather large luxurious house and especially both were transported to the house arranged by the system.

System: you are paired together and you have to love each other, build a cozy house together with ONE KIDS, wish you all happiness, nothing will change just a few more houses stop worrying!

"yooghyuk's face froze, the very serious and intelligent main character is now frozen"