Root Infinity Rexx

Root Rexx, stylized as ROOT∞REXX, is an otome visual novel video game developed by Otomate, exclusively released for the PlayStation Vita by Idea Factory on January 22, 2015 in Japan. The game follows Mochizuki Kazune, a teenage girl who meets members of the fictional boy band Rexx.

The rock band "REXX's" debut single was an explosive hit.

Not allowed to show their faces in public and do live shows, the band members are represented by mascots of themselves in promotional videos. Even so, they grew popular through word-of-mouth, and eventually garnered attention from all over the world.