Heo Young Ji went to Thailand to study and research about global music for a month. She met the cutest and kindest guy she'd ever seen in her life. This guy is Kunpimook Bhuwakul, as popularly known as Bambam in school. She had a huge crush on him and followed him like crazy. But then, no matter what she does, he never seem to notice her. She had to give up and go back to Korea due to time constraints. However, she is decided that Bambam is the one fated for her. Destiny will do its job, she believes.

After graduation, Youngji joined a reality idol audition and successfully debuted as an idol as a replacement member. She quickly entered a variety/reality show called Roommate for her promotion. Through this, she met this guy named Jackson Wang. A co-member/co-maknae/co-rookie idol/sometime-a-friend-mostly-an-enemy guy. They always bickered even for trivial things. The worst part is, it seems that they will be stuck together most of the time because of the program.

Things changed when Jackson introduced Youngji to s. She learned that Bambam is actually part of the group! She can't believe that they debuted together!

"Can you please help me with Bambam? Like a love bridge, you know? Please. Please." Youngji pleaded to Jackson

"What??" Jackson answered with a puzzled face.

"No way!!" He added, giving her a cold response

And so, their funny fate has just started