Nae Gutjeureul Dollyeojwo!

In high school, Hae-Seo gets injured while helping Se-Hyun who got into a fight. The two end up parting ways without even saying a proper goodbye. Time passes, and in his twenties, Hae-Seo, still a devoted fan of his favorite singer, attends fan signings and sees his performances whenever he has time. One day, while fending off threats from a malicious fan at the airport on his way to see his favorite singer's overseas concert, he runs into Se-Hyun again... After being hit with a drink, Hae-Seo quickly gives Se-Hyun merchandise and a handkerchief from his favorite singer and leaves. After the concert, they meet again at the hotel, where Se-Hyun shows up holding a handkerchief, and their relationship is rekindled.

(Source: Ridibooks, translated)

Note: Part of CNC Revolution's OOTD Danpyeonseon (OOTD 단편선) Collection.