(without box&manual) ROOT ∞ REXX [Limited Edition]

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Otometo x 0 sum ×Kiramune× It is a love adventure presented with the strongest collaboration of Dengeki Girl's Style.
In order to revive the band that I admire, the days of drumming of the main character begin!

The rock band "REXX (Rex)" recorded an explosive hit after announcing its debut single.
With the stance that it is not allowed to appear in NG and PV, it is exposed in the image of the member Character Cactor. Although there is no live performance, it became popular by word-of-mouth and attracted the attention of the world.
However, without releasing a second single, the main character suddenly declared his indefinite suspension of activities one day. It became known as a legend.
About a year after the shocking announcement of suspension of activities, the main character Kazune Mochizuki, who was fascinated by the sound of REXX, finds a demo CD at the place where he transferred to school.
Surprisingly, it is an unpublished song of REXX?