ok but I kinda should warn you,
1. It is not really a serious anime... at least i don't think they intended it to be.
2. It does have some adult themes (ie Kamina is a perv XD).
So yeah It's not R rated stuff, but it's pretty typical anime content.
This coming from the guy who watched Elfen Lied, and read the Manga because of the plot. (such a good plot, bad ending but so many feels... I digress)
Have fun if you do watch the anime, it's not immense, I watched it in... like 3 days time (the whole 2 seasons)
I would recommend...
http://www.gogoanime.com/ If you don't mind watching subbed animes (always better than their english counterparts).
Now I'm going to go pass out! I've been up all night and it's like noon in Michigan XD.