Now we come to an anime that's not afraid to bare all for it's viewers, it's time for High School DxD.

The story begins at a girls school turns co-education for unknown reasons but it's not important. We focus on the life of Issei Hyodo, a typical high school pervert but as it usually is with these ecchi harem type anime, he's apparently got a good heart.
Luck seems to hit him early on when he ends up on a date with a girl but ends up being killed by said girl as she reveals herself to be a fallen angel. Issei gets revived by the lovely red haired devil Rias but in exchange he becomes a devil as well, although this isn't a bad thing as he also finds out he has a cool power he never knew he had and the fallen angels want it.
After a few battles, Issei joins the Gremory household as a pawn alongside other devils that assist Lady Rias, all of which have nicknames of chess pieces as it follows a strong chess motif, this also includes a former nun named Asia Argento who joins after the first half of season one. In the second half of season one Issei beats down a noble devil to reclaim Rias from an arranged marriage; there are two more seasons after this.
Now when this anime began, I was skeptical because it was going to be another one of those shows like Akikan where you have an obvious pervert with a good heart but the lead female is the ultimate tsundere but this time we don't get that from Rias and thank god for it, otherwise this show would suck.
Saying that it does take a while to get going but once you get stuck in, you're left wanting more by the time Season one ends.
Yes it plays a lot of shameless ecchi moments, and never shys away from showing full frontal nudity, well the DxD does refer to breast size after all; but as a bonus we get decent action, mostly well written characters and a story that rarely resorts to horrid cliches. The music is incredible and the dubbing is really well done and we even get a few comedy references from other anime. My only question is, can it manage to avoid the dreaded curse of Season 2 downfall? Well we'll find out at a later date.
Final Verdict: While looking like a typical show of it's genre, High School DxD manages to surprise it's doubters by focusing on the action and plot with the bonus of ecchi. This is one ecchi where you can feel proud to say "I watch it for the plot"