He was choosen to go to another world via some pact/bloodline of his family (exact reason eludes me) and while his older sisters were prettier and more competent than he was, he accepted out of good will to be the sacrifice. Only to meet the goddess of that world and she blasted him being ugly and unacceptable and threw him into the wasteland and told to never go near her humans while she recuited her own heros who were...... looking the part?. . So when he gets to the first human town he tries to enter, a bishoujo sees him at the gate and runs in horror alerting the town and it goes hostile. His high mana contributed to it (amplified it I think), So he has a mask crafted for him which hides his face and hides his mana and he goes on with his daily business mixing with the humans. But dont worry, the town eventually gets its deserts by being destroyed and mostly everyone got killed (hardly any suriviers to tell what happened). Even better it brushes over the fact like spilt milk and the story moves on
asif your not suppose to give it a 2nd thought to the tragedy that happened
. Mind you the story doesnt really talk about his uglyness much from that point.. To be honest, hes not that ugly in terms of character looks . He looks like your generic MC whos just said to be ugly for that world. Oh, and I tried to avoid saying it, but I guess its for the best.. He hangs out with Orcs, since he met them in the wasteland. Even has an orc in his harem. Orcs look more piggy than your traditional fantasy Orc tho.