Not really sure what is it, but probably just a collaboration between a-nation and 7&i for a music event
http://a-nation.net/summerlive/index.html
7/4 AAA, BRIGHT
7/11 TOKYO GIRL'S STYLE, Dream5
7/18 hitomi, Takasugi Satomi, Misako Sakazume
7/25 Ami Suzuki, TOKYO GIRL'S STYLE