Blog post: https://blog.kinkoid.com/features/b-d-s-m-awakening/
(https://blog.kinkoid.com/spotlight/test-server-awakening/)
(above is subject to rebalance)
No, that means you can't level up your harem until you collect enough gems to awaken beyond 50, 100, 150, 200, 250, 300, 350, 400 AND 450 (and so on).
I couldn't collect enough gems to test if you have to awaken every girl or several at once.