I cant see a happy ending other than, happy ever after in prison 😔

I think Number 15 will be his partner, half of his face was reveled on the cover, and the other guy took care of him because he looked like his brother, I don’t see sexual interests from him, but number 15 sexually interested in him, he even tried to kiss him when he fainted, we still need to wait for the real plot to know what in the Author head