Dojun had a big crush on Jaehee since they were in high school. During this time, he couldn’t figure out things with Song Jaehee, so he tried all the way to end this feeling and started a new journey when he went to university. However, he ended up meeting Song Jaehee again inside their dorm and accidentally broke Jaehee’s arm. All he wanted to do is running away from Jaehee, but now he has to take responsibility for this. Jaehee presented a contract asking Dojun to be his boyfriend for four weeks instead of a monetary repayment. What will happen during four weeks? Would their relationship step to a new level?