Their name is TRA TRA TRA and they started activities with their live on January 30th 2015!
All members have been in different bands before, so you might see some familiar faces.
The band's first release has been a mini-album entitled セカイグラフィティ (Sekai Graffiti). It dropped last month on February 11th, including five tracks. You can buy it from CDJapan for 2100 yen!
Here is a video with samples of their mini-album tracks: