Having just released a teaser video for their self-composed track, "When the Door Closes",�leader Doojoon and maknae Dongwoon finally dropped the track in full! The song has a soft, peaceful piano melody which is perfectly complemented by the members' irresistible voices. Meanwhile, the other two duets, "Thanks To" and "Let It Snow", as well as a longer version of "Lights Go On Again",�will be released over the coming days. Check out "When the Door Closes" below!