I'm looking for an ecchi anime for adults. It doesn't need to contain nudity as long as the story is good. A little comedy if possible!
I don't want something mindless like Highschool DxD where u just see random scenes with nudity.
Something like Kiss x Sis would be good. (enjoyed the story)
You'll have much greater chances of getting excellent and mature ecchi stories if you look for manga. There are few such works animated and a lot of the time they make many changes to the plot. Holy knight is a recent example; Nana to Kaoru another one.
Oh, one very good mature ecchi series is Ebichu; if you like the style, you could try Momoiro Sisters, as well. Both are slice of life so they don't really have a specific storyline, but they are still worth checking out.
Okay, confession time...I know it's a hentai technically but I found Koihime hilarious. I think there's 4 or 5 semi-short sex scenes in the two episode series, but for the most part, it is story and is pretty funny for a hentai. FYI, I normally don't recommend hentais either. I'd say if we're going purely ecchi...Kore we Zombie desu ka? *shrugs* I liked the 2nd season better. I have a hard time calling Hoshizora e Kakaru Hashi a "ecchi" but I guess you could classify it as one and would be my top recommendation.