After My Sister and I Swapped Beast-Transformation Pills

For the sake of the family's interests, our father force-fed my sister and me Beast Transformation Pills. My sister became a plump, fertile white rabbit, while I became a bewitching green snake. After we turned into beast women, my strong-willed sister was sent into the old emperor's harem. Unable to navigate palace intrigue, she was killed while pregnant. As for me, shy and frail, I was tortured and played to death. When I opened my eyes again, we were back on the day we were force-fed the pills. My sister and I exchanged a glance. “Switch?” I nodded. This time, it was our turn to rule the world...