After a long hiatus, the F.T. Island boys kicked off their comeback promotions through today's episode of 'Music Core'. Since it's their first Korean work in almost a year, the boys aptly named their third mini album, "RETURN". F.T. Island has been actively promoting in Japan, and still are, to some extent. Their title track, "Hello Hello" is a fast-paced rock track that records at 200 BPM. With an added acoustic effect, the song is definitely a refreshing rock track that's perfect for the summer season. The title and lyrics are about a man who's unwilling to bid farewell to his lost lover by greeting her with a "hello hello" instead of a "goodbye." Check out their comeback below!