the boy is very tall so he can tease the girl who is very short!
a scary-hot guy.
a shy girl
they fall in love with each other.

i've read:
toradora
Hiyokoi
Ookamidomo no Shitsukekata

thanks

Not quite delinquent romance, but horimiya
The main guy is delinquent-like and is taller than the girl, although the girl isn't short per se.

With a twist: Koharu no Hibi

She's the scary one.

Also if you don't mind nudity, there's Toshiue no hito

He isnt really tall just normal tall(compared to a girl) Onidere

Hmm...
Midori no Hibi: http://myanimelist.net/manga/572/Midori_no_Hibi
REALLY FREAKIN CUTE <3

Ocha Nigosu: About a delinquent whos considered a devil joining a tea club, and has the goal of being kinder and not hurting anyone anymore. He slowly falls in love with the president.

Kimi ni Koishiteii Desuka: A guy with a scary face but is truly kind at heart and loves reading shoujo manga. It's currently being translated, and only has six chapters out, but its adorable.

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Narabuna Kiken!! fits the description perfectly, it's pretty much the entire premise. It is a oneshot, which I usually wouldn't recommend, but it's good.