[He was used to being the stronger one and asked to do tasks, not have them taken from him by others... this other world was still so strange in that regard. But she was obviously offering out of kindness, and he wasn't going to deny her.]

I just need to stop by the library, I have a few books to return. But I can do that another time, I don't want to make you carry anything for longer than necessary. What kind of boy would I be, to let a nice lady carry all my things like a pack horse all day?