Kosuke's Gangsta. is missing on this list. The male leads, Nic and Worick, go way back. Now two seemingly harmonious handymen who run a small jack-of-all-trades business in a shady fictional ghetto, they're shown to have a deeper connection as their dark shared past is slowly revealed.
You won't find the slightest hint of Shounen-ai, so don't worry.

[color=#8A795D]"Stories are what death thinks he puts an end to.
He can't understand that they end in him, but they don't end with him."

• Ursula K. Le Guin, Gifts[/color]

To be savoured:

• Blood Alone by TAKANO Masayuki
• Otoyomegatari by MORI Kaoru
• Gangsta. by Kohske
• Seishun Kouryakuhon by AKIZUKI Sorata