Well this is 99% smut, if that's okay then: https://www.mangago.me/read-manga/shinai_to_derarenai_1/
Oh shit wait, this rec is specifically for the first two chapters, the rest of it features a different couple with only a dash of these guys.
My current obsession: https://www.mangago.me/read-manga/a_millennium_in_love_s_purgatory_offical/

Any BL recommendations where uke has the bigger dick compared to the seme? Just finished Biscuit and I'm craving more.