I love this one, but it seems to be a hit or miss for others.
https://www.mangago.me/read-manga/concrete_garden/
Bittersweet
https://www.mangago.me/read-manga/500_nen_no_itonami/
Quirky little one shots. Loved the second story.
https://www.mangago.me/read-manga/niini_no_mori/
One shot
https://www.mangago.me/read-manga/the_bride_of_god/
Actual love triangle
https://www.mangago.me/read-manga/a_senpai/
Here~
1. Walk on Water (Yaoi)
2. Under the Green Light (Yaoi) (ONGOING)
3. Black mirror
4. Neji no Kaiten
5. Back to School
6. At the End of the Road
7. Royal Servant
8. Shame♡Application (Yaoi)
9. Body Complex (Yaoi)
10. The Devil’s Temptation
some good completed BLs, not too long tho (less than 70 chapters)