So…. I haven’t read the whole smut thing cuz it was getting angsty…. But can someone...

Even I, who read everything, don't understand then how do I explains to you? All I remember is they're fucking Leon every changes they got (not complaining, I'm here for fun not for story)

im pretty sure we know absolutely nothing about what the fella was settling rn

If I remember correctly Leon always had the capability to give birth essentially, mephisto just gave him something to basically make him go into heat. The leader ordered it after leon lost his powers, they couldn’t do anything before because he was too powerful but it’s not all settled and nothing was resolved yet. We don’t even have their full backstory. Idk why the author is making everyone so comfortable with each other but it’s poor progression

Leon mysteriously arrived in the world years ago and was taken in by Cliff, at some point Cliff mysteriously disappeared and Leon gained immense power. Leon, because he was not native to the world, began to cause trouble in the world trying to find Cliff, which pissed Nergal and his allies off (because they had been in the process of trying to revive their world (as no births occur in that world, monsters just eat each other for power) and build an army). However, Leon was too powerful and could not be stopped (and he captured the interest of Nergal) so a deal was made where Leon would essentially become the new ruler of the world in exchange for Leon not destroying everything left. Leon would be the ruler for a long time, meaning he built relationships with a lot of his subordinates (not necessarily good ones, as most of his subordinates hated him or lusted after him and only followed him bc of Nergal or fear of Leon's immense power). However, it turns out that Leon's power was actually slowly decreasing over time, meaning he would eventually stop being a threat to the world. When his power did run out, Nergal assumed leadership again and explained their plan: Leon is part of a race of creatures that can get pregnant, and so they want to use Leon for repopulation. It does seem part of the plan is driving by the fact that Nergal has feelings for Leon but also he really wants to accomplish their goals, so he doesn't mind that Leon is passed around as long as something comes out of it (like a pregnancy or Leon becoming dependent on Nergal or smt.) However it seems that Leon's race can only get pregnant for the person they love, which I don't remember if Nergal and his allies do or do not know this information.
Anyways, Nergal throws a shot in the dark and allows higher up subordinates to go at it with Leon to see if they can get him pregnant, however it's not working and they continue with their other plans to save their own world. Leon despises most of his subordinates already, so them doing bad things to him doesn't really change much over all and just re-affirms the belief that they hate Leon. So despite what they might do to Leon, he wasn't expecting much more from them the moment he became weak. However, although Leon hates Nergal, Nergal being the ruler means that he is the only one that can stop and command others, so Leon is willing to take chances with him to try and set in motion a plan of escape. This also goes into the whole fact that Leon is trying to escape by trying to figure out how to store magic in his earrings as he cannot naturally hold magic, but it's a slow process so far. Leon hasn't forgotten what has happened but has decided to start playing somewhat complacent, as that raises less flags and what else can he really do? He has no magic and can no longer fight any of them, so he can at most just let things happen and retain some control by baring his fangs and not being dominated 100%.

Sorry for the long post, this is as much as I remember fron the top of my head.

Thank you much!!!! That was a good summary (づ￣ ³￣)づ