Bad Boys, Happy Home vol. 1 (yaoi manga)

Life sucks, and high school bad boy Akamatsu needs an outlet for his pent-up frustrations. Seven, a homeless guy living in a nearby park, is just the outlet Akamatsu needs. Soon, he finds himself heading to the park every day just to pick a fight, even though he never wins. So when Seven ends up kicked out of his favorite sleeping spot, Akamatsu decides there’s only one possible solution to retain his fighting partner…invite Seven home to live with him!