Since back in October of 2016, LOO?? have been gearing up for their debut by revealing one member per month, in addition to releasing a single album under the 'girl of the month's name to prepare fans for their sound. According to their label, Block Berry Creative, LOO?? will be introducing a brand new unit with Kim Lip and the next two members to come in June and July. 

So far, LOO?? have revealed 5 members - HeeJin, HyunJin, HaSeul, YeoJin, and Vivi - as well as one unit, LOO?? 1/3.