Mary stayed out all night

A korean drama featuring a girl, Mary whose father is heavily indebted met a rock singer one day. When her dad was running away from debtors, he met an old friend who is rich now after going into business in Japan. This friend decided to help him clear his debts and wanted Mary to marry his son. Mary is reluctant so she fake married the rock singer. But, her dad stole her identity card and married her to the rich guy's son. Legally, she's married to the rich guy and she held a wedding with the rock singer.. So, they start a 100 day deal. After 100 days of being with them, she was to choose which one she wants. At first, she don't want any of them but gradually rock singer and her fell in love. The rich guy's son fell in love with her as well. So, on and on, a lot of stuff happen but in the end, there's a happy ending. ^^
I don't really like the plot. But the drama is funny. A lot of scenes where it's so cute, or sweet or just hilarious. So, quite a good drama to cheer you up and pass time when you feel bored.
And of course, I've to ask myself again. WTH am I thinking, watching it with four days till exam???
*speechless* I've no idea what to say...