Can be regarded as a subcategory of unusual & unique BLs, because seinen/shounen/noir & BL combo is rare.
Creators: Okujima Hiromasa, Takahashi Hidebu, Est Em, Okadaya Tetuzoh, Asada Nemui, Totempole, Kajimoto Reika, Mentaiko (geicomi dj mangaka influenced by famous shounen/seinen stories), Iwasawa Midori, KOIKE Sadaji, ARAI Niboshiko
Also:
https://www.reddit.com/r/Animesuggest/comments/17vufpd/are_there_any_shounen_manga_with_bl/?rdt=44199&onetap_auto=true 
