LOONA Premier Greeting: Line & Up is a series of official fan-event besides fansigns in between the LOOΠΔ Cinema Theory: Up & Line. They took place in June 2 (Sat) 6PM and June 3 (Sun) 6PM (KST) at YES24 Live Hall.
The debut of the first girl on October 5th 2016 and the debut of the twelfth girl on 30th March 2018. The 12 girls who has gathered within the span of 524 days will be introduced to everyone for the first time. 12 girls' story and the units will be waiting for everyone.