The two last chapters has to be categorized as ecchi, and what the heck is going through Hiro's mind, with getting a perverted dragon and just tons of more naked pics of Lucy? Does he realize that he has some female readers? I believe that if they are gonna animate this fight they are probably not gonna do it so detailed, or just put up a warning. But it is rated 13+, so perhaps they will just think that it is ok.