It is not good enough in my mind to buy volume 2 though it did leave off on a cliff hanger so if I didn't already read the entire story arc and the next couple too i would want the next volume.
Case in point, girls don't just randomly strip naked and then crawl into a guy's bed unless they're at least dating, and sometimes not even then.
I've read a few ecchi series before and they do it a lot better, instead slapping you with a naked girl.
However, she still insults him when his perverted nature gets the better of him at least when it isn't directed towards herself.