Rutta to Kodama(2010)

Rutta to Kodama

1-3, 6-21) Rutta to Kodama
Ruizaki Takao has a new roommate: transfer student Miyagi Kodama. Ruizaki's a rough guy who gets into fights all the time, but he's gentler around Kodama (who gives him the nickname 'Rutta'), and the two eventually become close friends—until one day, out of the blue, Rutta confesses that he's in love with Kodama…and thus begins their relationship. A beautiful, humorous school-life BL manga detailing the pair's blossoming relationship, with its ups and downs and everything in between.

4-5) Torao and Tatsumi
The 'Western Tiger' Torao and the 'Western Dragon' Tatsumi are not only two of the strongest guys in the city they're also childhood friends.