变身魔宗圣女，我发现自己是鼎炉 (Associated Names)

Story of: Transforming Into The Holy Maiden Of The Demon Sect, I Discovered That I Am The Top Of The Furnace At the beginning of the transformation, my sister, still a Demon Sect saint with the status of a saint, was a good start, but I didn't expect that my beloved master would be a…