It's been a few years since SHINee last seen Yoogeun, and MBLAQ seeing Leo, Lauren and DY. How will they react when Hello Baby is doing a re-union with the two bands? How will the 'APPA'S' do raising four teenagers? How will G.O. and Seungho handle the 'boyfriends' of there little girls? How will 'Umma' Key react when Yoogeun brings home his 'girlfriend'? Will Leo finally choose between Lauren and Dayoung?