During the making film, DEAN, who took part in composing the title track, explained why "1 + 1 = 0"! "Many people have the assumption that '1' means the number one itself. However, people in society today are so bogged down with 'il' (which is also the word for 'work' in Korean), and so focused on working all the time that they just don't have the time for other things. In that regard, if you add one and one together it equals to nothing," DEAN said.
Check out their making film below!