Alt. title: ファックバディ
From Yaoi Sekai: A slutty friend ends up developing a love of anal!?
Ryo, who possesses a higher-than-average libido, used to sleep with women he didn’t know. His only other sex-obsessed friend, Akanishi, has threesomes on a nightly basis. Two men with strong libido awaken to the meaning of love.
– chapter 1