Anime with a hot chick and a guy, who's chasing her xD

[theDarkSite]

So, quite specific, but I really need an anime, where a guy (a dork, or fat, whateva) is chasing a hot chick and she always is getting away. A comedy if possible. I'll really appreciate if you could name at least one anime of that kind xD

[ibabrak]

in Kami Nomi zo Shiru Sekai there's this main character that only cares about his PFP (PSP) and is only interested in girls in games. But in order to survive he always needs to get a real girl to fall in love with him or his head will be cut off .

Don't know if it will totally satisfy you but that's the only thing that comes to my mind now (I feel like I have seen a tons of that type but can't recall anything )