Wanted to comment about that thong and the really shady armour, but decided not to bother. In the end commented anyway because the alternative is complaining about it not even being inseki if she did join the harem.
Wait, did main character just pull Ging on that girl? Did he just legally change her name just because he didn't like it?
That's... Not entirely unexpected.
Imouto acquired. Sure they aren't actually blood related, but it's fine because they aren't treating it as though they are actually brother and sister anyway. So it's more that they're theming their relationship that way than twisting something that isn't incest into incest.
@CountryMage the marvelous world of magic, where you can summon anything... items, weapons, monsters, heroes... I remember that in a couple of stories the MC summon his waifu so summon an imouto enter in the universal plan... if you have any other question the answer is 42.