Two recs - both manga and seinen. As listed on MGG:
- Mysterious Encounters In My Neighborhood - MC is gay and has a crush on the deuteragonist, but the focus is ultimately their interactions with the Yokai around their area.
- Double - The two main male characters have something going on, but I wouldn't classify it as a BL, if that makes sense? The larger focus is on the journey of MC's acting career.
Oh! Also Love Bullet is listed as Seinen, but features queer characters. Cupids shoot with guns instead of arrows to get people to fall in love. It's a mix of of action and drama.
Wait, if you mean characters who explicitly identify themselves as queer, then "Mysterious Encounters In My Neighborhood" would be the only one to really apply, in that case. Mind explaining more about what you're looking for?
Any manga/hwa/hua where its NOT BL/GL but has like gay/lesbian characters in the story?