While they both are bit of jerks to each other, they are in equal measure, you have done good job of tension gain and release without it getting out of control. This gives a feeling there is hope for them to get along better yet. Boy is rude but not extreme, merely a personality based on his circumstances, perhaps he will be better behaved later on. Ah! You reap what you sow... *sigh* this why you don't assume things. And yet still, no good deed goes unpunished..., however...! XD Oh gawd! Many stereotypes in one! XD
Oh and humans never learn, or least many of them don't... but don't make too big of mistakes, else learning is the last thing you be doing!
While your VN is more on the simple side, I feel like you have put it cleverly between making the jokes seem logical and making the seriousness of the future mysterious.