I really don't understand why tomoe was so mad. So fucking what if his mana is getting bigger? As long as he hids the majority of it correctly, he can keep building it up to surpass the goddess, then nothing will be able to fuck with him. She was bitching for absolutely no reason.
And why the fuck were they mad at the end? A man has the right to sleep with whoever he wants to. They seriously just dragged his ass away like he was a kid, not even taking his opinion into consideration. I fucking hate mangas like this where the side characters deprive and limit the choices the MC can make for himself. It's so fucking annoying. He should just man up and tell them to fuck off.