uh-huh, yes they did. although i don't remember it clearly since it was a few chapters ago, i think jesse put something on law's head and law imagined that he was in another world where he saw jesse happy, who then hugged him. maybe this is half of the thing that actually happened but it's been a while.
Yeah they showed us that in chapter 37 where Jesse used it on Law
let's go with protecting them until moritat messed up and not sangwoo-killing-stalking messed up.
let's got with some limitations
In chapter 41, Jesse and Law are talking about when Jesse used the system on Law. Did they show us that before? Because I don't remember that.
Anyway, I'm pretty sure Jesse isn't sleeping with anyone but Law.