Danzai Sareru Koushaku Reijou, Umarekawatte Last Boss no Ouhi-sama no Kodomo ni Narimasu

I was supposed to be an ordinary working adult, but when I woke up, I was in the body of a little girl on the verge of death from abuse by her stepmother! Apparently, this is the world of a novel, and I've been reincarnated as Lilia, the villainess who is wrongly condemned. But now that I've remembered my past life, things won't go as planned...! To start with, I asked Queen Hilbert, the final boss of this world, for help, and to my surprise, I succeeded in being adopted—!? What's more, the queen dotes on me, and I've gained an adorable older brother, so my second life is almost too fulfilling...!? From a condemned little girl to the adopted daughter of the final boss, a complete turnaround! The start of a second chance and rise-to-power heroine fantasy☆ (Source: kodansha, translated)