Author keeps calling MC an average or ordinary high schooler, but how is being a martial arts master an average thing? There are laws against false advertising!
This "in the previous chapters" start annoying. It's just 7th chapter. Author think his readers has memory like of gold fish?
Also, what the heck with head of slave trader? He look like nutcracker doll.
Dude is summoned to this world by Orcs.
Now he is lusting after a female knight. He was a better fit for the Orcs than he'd admit.
Also I can't think of any reason he'd pass over that Acacia girl. She massive. Massive girls = better. Maybe it was because the scales on her chin looked like a goatee.