It's a great title, one of my favorite jousei (though the list of jousei I can stand is very, very short). I do believe the anime is better simply because it... has sound (so the drama would be better for the same reason, I guess), which is kind of important for a music series, but even without it, the manga is sweet and funny.
As for sexual situations, at least of what I'VE read (which admittedly isn't that much; I did see the whole anime though), there isn't any hugely explicit stuff, but sexuality exists. There's a perverted character who gropes, but the uh, images aren't as... vivid as it might be in shonen romance and the like. The title character can be kind of a pervert too, but it's all in humor because she's very awkward and clueless. So it's mostly risque humor, not so much actual situations.
Language I don't really pay attention to, so :/ sorry. Violence is all comical.