Kenen Lovely Punch

Kayata, a strong karate girl, and Nagaomi, a handsome, high-class boy, were once childhood friends, but now they're famous for bickering like cats and dogs at school. Kayata fell out with Nagaomi after a sudden "unwanted kiss" from him two years ago. Now that she's in high school, Kayata wants a boyfriend of her own, but Nagaomi always seems to show up at the most inconvenient times!??

(Source: Betsucomi, translated)

Note: Chapter count includes one bonus chapter.