BL that focuses on the relationship before smut? i've read cherry blossoms, one room TA, n...

Rainbow city (SA in chap 3, best to skip)
no moral

https://www.mangago.zone/read-manga/majo_no_inu/
https://www.mangago.zone/read-manga/koi_ga_ochitara/
https://www.mangago.zone/read-manga/two_souls_1/

Hope they're to your taste

Spinach bouquet
Green apple paradise
Reunion
Payback