Reign Of The Lost Parliamentarian

In a medieval world, where slavery is still allowed and where nobles use them as they please, our main character dachi, wishes to change this.
As the name suggests, our main character is part of the parliamentary and his job is to go up to the government and to provide them with arguments to change this. But our main character, is this his only goal ? Is changing the world of such a little rule the pinnacle of what he’s capable of ? Follow the adventure of dachi and of how he’s gonna reign on everything he possibly can.
sorry if the chapters are short by the way, I will change this as story goes on.