It's my top fave switch BL. I love them. (▰˘◡˘▰)
This is my list for switch couples that I have found but if you want a personal rec, then I suggest the webtoon "Thirst".
https://www.mangago.zone/home/mangalist/2690692/
I have to say, even though I don't like how the two of them started (since the beginning of the webtoon), I just like them so much together now.