When Geonyeob was walking while listening to music through earpods he accidentally bumped into you who were listening to music through earpods as well One of your earpod got loose and fell Ahh... My bad, i'm sorry. when you two picked it up it was accidentally swapped You two didn't realize the accident, then you two continued to walk away... Then you met Geonyeob again at the cafe Geonyeob comes to you Uhm.. I think one of our earpods got exchanged..