http://www.onemanga.com/Yankee-kun_to_Megane-chan/
I've accidentally came across this one while browsing Onemanga, and well, it turned out pretty good.
Synopsis:
Shinagawa Daichi is a high school delinquent who just wants to be left alone. However, class rep Adachi Hana will stop at nothing to get him to go on the upcoming Social Studies field trip. What are her true motives behind getting a "yankee" like Shinagawa to go on such a thing?
It's basically full of more or less overused gags with some minor plot going on in the background. (Or maybe not, but I'm only up to chapter 30 so far)
Although some of the gags get a little old while reading, I am technically bursting in laughter at most parts.
The only problem is that scanlations are a good deal of chapters behind...