Internally, Amakusa was laughing so hard at this kind of situation. Sure, it was needed to be done to reach the top of this fragment, but on the other hand-... having Ange in such an embarrassing position was just too much. She must have been red in the face, or cursing at him- but he couldn't help it, he thought she was adorable when she was so tsundere like this.

He went towards the wall, with her on his back of course, and started to climb it. But this was going to be a long way up, might as well make some conversation, "aha- lady I knew you were well endowed but this is ridiculous," yep. Conversation by making fun of her chest. At least he has some entertainment while he's trying to climb.