I forgot to put a 'reply' in:
Would you please reply to the "slavery" thing?
Sure.
I'm pretty sure that everyone here can agree that slavery = bad. But realistically that's in a real world context. In the real world the only type of paying in exchange for human life that isn't bad is adoption. With adoption you only "own" the person in-so-far as a parent owns their children...
All other forms of slavery, from outright slavery to wage slaves is bad
by definition.
But we don't have the system in place to allow for a form of slavery... Of selling oneself or "employing" current criminals... that isn't,
by definition, evil.
Imagine a world where a person could sell themselves into an employer-employee relationship where the terms are more favorable than wage slaves, but the "employee" is forced into silence by "mystical forces" (i.e. not violence, but magic). Or the employee could set their terms for "employment" but were sworn to those terms for the duration of their service period, and still sworn to silence.
There have been "slavery" systems in manga that are vastly better that anything on Earth. Most of them require magic of some sort (or technology advanced enough to replicate the effect), but some of them just require people to be more civilized with one another before they could be implemented.
So, is slavery wrong? That depends on which "world" we are talking about. This Earth we live on, well, duh, I doubt anyone with half a brain cell could argue with that... But there is something to be said for the system which this world our MC lives in.
No, it isn't perfect by any metric. But the people seem to be treated fairly. There is a distinction between "sex", "combat" and "other" slavery (if memory serves). At times it even seems that they can set their own terms (that may just be my wishful thinking though). Additionally and importantly it doesn't appear that there are mass captures of innocent people for selling purposes and I haven't "seen" any specific racial discrimination. Two things that add to slavery's abhorrentness.
While it isn't the best system I've seen (that goes to the one in the isekai manga where the MC has a gate to other worlds called the "moon gate" and finds Japan. I can't remember the name but if anyone else reads this I am sure they will correct me...) it certainly isn't the worst (that honor goes to our great ol' US of A back in the day... Fight me, I'm American myself (please don't fight me)).
To make a long comment short, I'd say what the system in the MC'S world needs is a term limit, and additional, admissable protections for those who sell themselves or those who have "light crimes". (Admissable as in can be waived) Among some other tweaks.
I tend to drag on, so I'll shut up here. I'm happy to continue the discussion though.