I have watched 2 Episodes for this drama and i can say this for this drama.

1. The FL has 2 personality and she is switching it in day and night.
2. The FL Ex is still trying to get back or FL is still has lingring feeling for her Ex.
3. The sencond ML is also join this mess of FL & ML.
4. The FL is having the second peronality of her sister or somting like that.

So far this is what i can tell, lets see what is there in the store for remaining episodes. Hope it doesn't disspoint.