“BL” stands for Boy’s love. OR typically refered to as Yaoi or Shouen Ai. BL is male x male. Gay couples. No straight, just opposite sexes. Either in novels, fanfiction, manga, comic, book etc…. They all fall in the same category. Even “bromance” too. Weather it’s sexually or just cutsy momments between 2 guys, it does not really matter, it all falls under the same catgory.