I'm about to start watching Ben-To right now, and already the summary is cracking me up.
"The story revolves around a poor high school student named Satou You. Satou goes to the supermarket one day and discovers a bento (boxed meal) on sale at half price. Just as he reaches to grab it, he ends up on the floor unconscious. Satou has just entered the fierce, no-holds-barred supermarket survival battle for half-price bento."
Watch it, I can only recommend it, finally a protagonist with balls.