Shame isn't good for you. There probably is a limit to it, but I'd much rather it didn't.
I actually didn't see that, though. I can't decide on what I like the most about nii-chan. He treats me very well, he's really helpful, he's more to the M side, which is a perfect fit for me, he's cute (but not in an inexperienced way) and modest. And I'm only halfway through his qualities! I can't decide.