Raplh, just be grateful for not having pathetic little arms and a woefully obsolete brain.
Some humans are born with tails. Said tails look really ugly are often clipped shortly after birth. The human tailbone is a sad joke even when compared to a rabbit's tail.
Modern humans can eat and digest bones.
Well, at least Kana's legs work just fine.
Hmm, this manga is more insane than Warehouse 13 and absolutely non-credible. Glorious!
That ending scene was comedy gold!