beta
There is a BL manga where one guy has a secret crush on the other. He thinks the other is into hard stuff so he asks him for help using things like sounding rods and stuff. May have been a salesman, I forget.
When u said sounding rods (which I have no idea wtf it is) I thought of "Let's go ASMR!" it's probably not what you're looking for but idk it could be????
Gay uke is in love with the straight guy, who falls in love and thinks he can be a couple, first time they go to have sex the straight guy gets freaked out and backs out. They do eventually end up together though
maybe this one?
https://www.mangago.zone/read-manga/neon_sign_amber/
omg thank you that's the one