When Qianniu (Cha Tae-hyun) first met her (Jun Ji-hyun), there was no romance at all. On the subway, she said something shocking. She was drunk and scolded people who didn't consciously give up their seats to the elderly. After vomiting, she fell down limply. The kind-hearted Qianniu stepped forward to catch her, so he had to carry her to the hotel. But good intentions don't always pay off. Qianniu was taken away by the police who rushed in while taking a good bath. However, the two people started dating from then on. She is very domineering and willful, but when she smiles at you with that cute face, you can't help but soften your heart. So Qianniu was willing to be tortured by her. Gradually, Qianniu felt that her heart was hurt. He tried his best to care and protect her, but she still lacked a sense of security. Although they were happy and moved together, she still made an unacceptable agreement: Let's separate first...