RENTRER EN SOI (リエントール アン ソイ) was a metal band from Japan, formed in 2001, but their activities during their first two years were scarce. They released a few demo-tapes, a few singles that were only available at their lives, and that was it. At first, the band consisted of only four members: Satsuki (砂月) on vocals, Takumi (匠) and Ao (蒼) on guitar and Ryo (遼) on bass. A slow start didn't seem very promising, but their determination paid off a short time later.