SDN48 who disbanded in March 2012 made a surprise appearance at AKB48's Request Hour after their song, Kodoku na Runner ranked in at no. 18.
Below is the performance.
During the MC, SDN48 announced that they are going to have a reunion concert for their fans as promised on 31st March 2013 at the AKB48 Theatre.
Woww I was sooo surprised but happy to see SDN48 still rank in Request Hour. And yayy theater revival performance!!
P.S. sorry I can't embed youku properly again :(