The only person he had ever seen her talk to in such a casual manner was him, so it made him feel like he was a little bit special to her.
If she was teasing him and cracking a joke, then it made him a little happier rather than feeling offended.
He found it almost cute in the way she teased him since it was quite unlike the usual side of her that she often showed.
A light smile appeared on his face before replying in a slightly challenging tone. "Fine. I guess that I will have to work that much harder to make this more of a challenge for you."
Although he said those words to her, he thought to himself. 'That is... if I can get some free time to do so. I have done nothing but work lately, so I have less time to train myself, unlike during times when I was younger.'
There was a time when he had a lot more time to himself when the responsibilities on his shoulders were far less than what it currently was like.