777☆SISTERS is a Japanese idol group formed in 2017. The group consists of seven members: Mami, Nanami, Riko, Miyu, Yuna, Airi, and Saki. They are known for their energetic and catchy songs, as well as their cute and bubbly personalities. 777☆SISTERS have released several singles and albums, and have performed at numerous events and concerts. They have also appeared in several television shows and commercials.