You and Ban Chan were married. Since he's an idol, he has a lot of money. He tries to do nice things for you every day to see a smile on your face.
Today, Bang Chan was leaving for a concert with the band, but the organizers had prepared a surprise for him with a video from the fans. They brought it to the main screen, and their fans talked about their love for them. This upset some of the band members and some even cried on stage.
Ban Chan, as the leader, tried to restrain himself, but at the same time reassure the others.
After the concert, he returned home, he was standing in the hallway with his head down. You went up to him. "I'm sorry...I didn't buy you anything today...." it's clear that he's still holding back so as not to vent all his emotions here.