The Most Ordinary Love

"Jae Hoon" (Kim Rae Won) is reluctant to leave his girlfriend who broke up with him. The morning started with a hangover as usual, and he found that he had a 2-hour overnight call record with someone at an unknown phone number. He learned that it was the person on the other end of the phone! "Sunying", a workplace colleague with whom I have exchanged names for less than 24 hours. "Sun Young" (Gong Hyo Jin) is in the midst of a heartbreaking breakup with her boyfriend. On the first day of working in the new company, the scene where I broke up with my boyfriend where I said everything that should be said and shouldn't be said! Was seen by "Jae Hoon" who works in the same workplace. They had only met for a day, and they knew each other's love history better than work matters. But the subtle tension and embarrassment are temporary, even the "unbelievable" and "speechless" collisions are still concerned. Why?