Fantasy: My Sister Can't Be so Cute

The ancestor of a dynasty accidentally traveled to the lower realm due to a failed attempt to return to the realm. Dongfang Yu'er: I am the Holy Body, the hope of the future of the college. How can Dongfang Changge compare with me? What, my brother was the first to figure it out? What, my brother turned out to be an alchemist, what, my brother turned out to be the Supreme Bone