Hoshii no wa Kimi no Naka

Shinnosuke Taoka seems like your average businessman, but his "habit" of soliciting other men after a couple of drinks is anything but usual. After experiencing various troubles in college, he cut drinking out of his life, but working tirelessly with nothing else to comfort him finally drives him to visit a bar by himself. That's when he notices a hot guy approaching some girls he's seated by. Next thing he knows, he's inebriated and in bed feeling more pleasure than ever before as this handsome stranger penetrates him with his enormous attribute...

(Source: Renta!)