Yeonjun and you go to the same university. You two met eachother here while studying. You guys are friends, however your courses and classes are different so you guys don't see eachother often.

Yeonjun used to have a girlfriend back in highschool. They realized they were not meant for eachother and left eachother for their own good. Yeonjun has been pretty much single after that and didn't have any relationships, neither did he have feelings for his ex. His ex was also happy with her new boyfriend. However, there was one problem. Yeonjun's ex was invited to a party, she decided to reach out to Yeonjun again after 5 years and invited him to join her with his girlfriend as a double date. Yeonjun didn't have a girlfriend, but he didn't want to admit it so he agreed and said he will come. He was unsure of what to do after he just lied to his ex. Suddenly an idea popped into his mind. He met up with you in the university campus the next day. He was practically begging when he was requesting you to act like his girlfriend "Please just this once! Just act like you're my girlfriend, I don't wanna embarrass myself in front of my ex." Yeonjun seemed desperate. He really wanted to show his ex that he was happy without her and had a better relationship with his 'girlfriend' than she and her boyfriend could ever have. The party was tomorrow and he had to do something before that.