Clover

is a manga written and illustrated by Tetsuhiro Hirakawa. The first volume of Clover was released on August 8, 2007, and the final volume, being volume 43, on October 15, 2015.

Plot
Misaki Hayato returns to his hometown and enrolls in the same high school as his two childhood friends. A lot has changed in the years he has been gone, his former best friends are seemingly distant from each other and leading relatively normal high school lives. Hayato's sudden arrival soon changes that and sends shockwaves through the entire town's delinquent population with his willingness to do anything for his friends and his love for a good fight.

Other Sources
Wikipedia