Mitsugimono wa Reiketsu Ryoushu ni Unmei o Sasageru

As a tribute, Shaula is offered to a lord who is rumored to be cruel and inhumane. However, during the nightly entertainment, the moonlight illuminates the grown-up form of Altair, the boy who saved him in Shaula's previous life.. Altair used to be an angelic boy, but what happened to him while Shaula was reincarnated? (Source: Hakusensha, translated)