Big Roleplay Idea

So this is something that popped into my head and I've been working on for a while (Thank you Powerwolf songs for inspiring me.) and pretty much its a longer term roleplay that can be full of content. First I'll give you a little bit of what I have:

It has been about three years since the hero had slain the Lord of Evil. All seemed well once coming back: Peace came back to the land, the princess was married off to the hero, monsters and humans lived together happily, and everyone seemed to live in perfect harmony. However, this was very short lived because in the short three years that the hero had taken the throne everything seemed to do down hill despite his best efforts. Monsters and hybrids who have bread with humans were cast down to the lowest part of the social totem pole, the latter being considered abominations. Pure humans are on the top of the pole being the most educated and wealthy of everyone along with that the church has risen to power spouting their words that pure humans are ones with the Celestial ones, what would be considered angels and heaven. They have given some of the lower class the ability to be in their army and earn a chance to enter the realm of the celestial ones despite being naturally corrupted as long as they disown everything from their family to their own being giving everything they have to the church to try and "bless", more exterminate, the ones that dare cross the churches path. You would think the king would stop something like this but he is someone who seems to be turning a blind eye to everything. 

For our character(s) it would depend on what you want your character to be. There are some basics that would have to be laid down such as:

Pure humans may learn magic however it is only a limited amount of magic they may access. These may include enchantments of weapons and armors, healing magic, basics like fireballs or lightning strikes but they are not as powerful as non humans doing them, and holy magic but this is something that takes years of dedication and can be very risky.

Pure monsters depend on what they are to learn magic and that can go for any monster/human hybrid, for example:

Slime, human/slime, centaurs, human/minotaurs, and harpies cannot learn magic and have to rely on their physical traits.

Nagas, Lich/humans, elves, and demon/humans may use magic.

(I'm taking a lot from the Monster Girl Encyclopedia cant ya tell lol.)

This Could go many ways that I don't mind like a long adventure with romance that slowly burns for the characters or a pure smut fest. 

If you're interested let me know and we can work out a lot more like characters and other fine details.