Her: "What are you?"
MC: "Um... I am just a normal guy. Honestly, I am just here for my sister's enjoyment, otherwise I would rather be sleeping at home. This power is also all just your everyday barrier magic. Sure... its a bit more advanced than usual standards, but its not like it is something outside the potential of magic, as I peaked at only level 2 on even a triple digit reader... so I can't be seen as being someone excessively high leveled or anything. Also, I was a human, but from another world. I was brought here by a Goddess after I died and was reincarnated into this body, so I definitely cannot be a god myself."
Her: "Yeah, like I would believe any of that."
MC: "You literally just said that one used to be a god who has been reincarnated as a human, and you're fine with it. You just dislike that I am stronger than you. And if we were actually to fight, what honestly could you even do to me?"
Her (flustered): "What?!... I could... Um... Maybe if... uh... Look, Its not that I am weak or anything... Its just that... You know... You could be... um... possibly... dangerous... and its... um... my responsibility to get rid of dangers?"
MC: "Why did that sound more like a question than a response?"
Her (now flustered and embarrassed): "Just shut up already with your stupid logic. Fine, you get a pass... for now. Just don't make me have a reason to fight you."