To mark their 5th anniversary, BOYFRIEND released a song "To my Bestfriend" for their fans.
The song is a sort-of "Thank You" song for the fans who have stuck with the boys through thick and thin.
Through an interview with Focus, Donghyun said that he was always grateful to their fans.
"Can't believe it's already been 5 years. There are so many precious memories and I want to thank the fans for being with us.