Art is good. MC, I mean the girl is great. That guy though needs a Truck-kun to run over his brain and sent just that over to the next world...
It's frustrating that there is a logical part that would make perfect sense to not let her jump his hips. He doesn't know the world and should be cautious of plots, a demonic ritual, perhaps enslavement, or being broodmare for life. So many things to be wary of in unknown situation. Not taking the words of this new person as gospel... But the MC display none of the wisdom. He search for a girl that is native in this world for who knows how long and he has experience for a day when he almost died. So conclusion, he is not wary at all, just idiotic. When she took his bed and he didn't want to sleep with her, he could just go to sleep in hers instead. It feels like he takes all the stereotypical crap that blights Japanese MC's behavior for many years.