Who are you, how did you get here-

Thinking about Levi being so overstimulated during sex that he starts crying and of course MC would soothe him and give gentle kisses

Satan(either from nightbringer SPECIFICALLY or simply during a tantrum that got more out of hand than he wanted) going to MC to take out some aggression, but instead he's surprisingly more gentle than he USUALLY is.

Normally after a round or two MC has bite marks, hickeys, a few open scratches where a bit of blood ia bubbling to the surface- the usual(not to say they aren't still there- simply there are less). Though for some reason when he's in a bad mood, despite wanting to take it all out on MC's poor body, he's gentle. Whether he's holding back intentionally or not is entirely unknown.

Harsh bites that could break skin are soft nips, scratches are less painful and often replaced by gentle touches-

It is my own personal belief that Leviathan, if he does fuck, would 100% be playing video games during sex.

Sorry babe, he's gotta get the secret armor in Demon Slayer Quest! He'll cum in a second!