So... Kin likes Ise who has sex with 'awakened' teenagers?

In the funny part is the fact of the matter is, it was never fucking explained and technically because they’re like humanoid there are teenagers, but like they do the basic instincts of an animal, so they age super fast, but being a teenager doesn’t matter because technically an animal kingdom that means that you’re breedable apparently so it’s a very weird mix of both to the point that it makes no fucking sense and it sucks and why that needs to happen in the first place like little population whatever but like choice is still a thing like if this makes no sense to me