Jurina Matsui
After photographs with their boyfriends surfaced, Natsumi Hirajima and Rumi Yonezawa resigned from the group and were replaced by Jurina Matsui of SKE48 and Miyuki Watanabe of NMB48. On March 24 AKB48 announced that five trainees would be promoted to Team 4, expanding its roster to 16. It was also announced that the group would perform at the Tokyo Dome stadium, one of AKB48's main goals since it was founded.