I want a list of dramas with a fake relationship, marriage contract or just fake boyfrienda and girlfriends.
Nagareboshi (oops japanese)
Kim Sam Soon
Lie to Me
Full House
Dal Ja's Spring
Goong
Mary Stayed Out All Night
Try those! Some are VERY Good.. Kim Sam Soon ...and some are ...not but everyone has their own tastes. :) Happy Watching!
Cofffee Prince (at the beggining)
Fated to love you
Mary Stayed Out All Night
My Girl (does a family relationship counts? xP)
Those and all the ones above, and yes, as Jeanie said, some are really good, specially Coffee Prince!
I don't know if you like Taiwanese dramas, but there is a marriage contract in Fated to Love You

Kdrama My Girl has a fake sister situation in it
haha oops I meant cousin
Rent a girlfriend home for the new year - Chinese
Drunken to Love you - Taiwanese
Rent a girlfriend home for the new year - Chinese
Drunken to Love you - Taiwanese