And we are back to our regular, no balls MC.
They attacked him with the very specific intent of rendering him into a magic invalid, and ruin his life yet again and having expressed the intent to permanently imprisoning him after that.
(she may have called it "pampering" him, but let's be real, that's just akin to clipping a bird's wings putting it into a gilded cage, and pretend that you are protecting it and giving it a good life)
But he'll fucking forgive them, because gods forbid an MC having the DAMN BALLS to bring down retribution to those who want to harm him, and afterwards I guarantee you those equally useless princesses will pretend that "all is good" ...and the very same kingdom didn't attack their special summoner AND THE GOD DAMN CROWN PRINCESS, not once but TWICE!
The very LEAST they could do was render the attacker into a magic invalid. But nope, she has the protection of having breasts and a pretty face.
And as we all know in 99.99999% of manga and anime the MC himself will never bring down retribution to a good looking woman.