Prinx Kal and Kristinne grew up together. They treated each other like real siblings and knew even the smallest things about each other. They promised not to fall in love with one another. They are bound to get married to their partners and get a happy-ever-after kind of love story.

But in just one night, they have broken the golden rule and enjoyed the night that is only shared by lovers, not friends.

How are they going to treat each other after that passionate one night? Can they still be friends even they couldn’t forget the taste and feel of each other? Or are they going to cross the line and follow the heartbeat they are forced not to entertain?