Activities as a virtual river group are centered on live broadcasting, and the content of distribution is wide-ranging, such as chat, live game, and karaoke distribution, but there are also rivers who post videos and publish original songs. Taking advantage of the strengths of the group, we also carry out collaborative distribution between rivers and events for the entire group. Also, in the VTuber industry, characters using 3D models were once the mainstream, but since the official river of Nijisanji appeared in the 2D model, the number of VTuber of the 2D model has also increased, "One stone in the VTuber industry. There is also a view that "thrown". Some of the rivers have made terrestrial activities and major debuts as music activities and voice actors.