Hm. Last chapter showed a silhouette of a boy and this chapter showed the reason why Hero hates demon which means:
The wife (as a kid) got into the village to have fun and then got rejected just to have that boy invite her to play.
Then a demon came and wanted to bring the wife back with some Orks behind him and then (probably) got called to have some meeting and Orks decided "Wow, while our master is not here why don't we kill these humans for fun and not think of a consequence?".
Then you know the rest.