You know...I know this MC is a perverted degenerate that'd put evil normally horny perverted degenerates to shame, but you have to admit that, considering he used to not be like this, the shock he must've gone through was significant. Heck, my dude fucking invented NEW MAGIC based on horny desire and sexual fantasies, etc., just to still have a way to maybe still slit the throats of the gods.
I mean shit, he even developed time stop magic to enchant a fucking PLASTIC ZIPLOCK BAG to make sure panties don't lose their freshness after being worn.
Like man, Setsuna has absolutely given in to the madness and will do everything in his power to kill those gods, to the point of even cornering his students into eventually giving birth to his kid(s) so that they can eventually kill said gods.
Like, I'd send him to a succubus therapist (cuz let's be honest; a normal therapist wouldn't last) to get this dude to some form of help or another.