Looking for Yaoi manga

This yaoi manga has a few stories but the one I’m most interested in is that these group of men have training (sex training) and the seme hasn’t had sex w his partner in a few years. The uke (his partner) has been training by himself so he doesn’t finish quickly (or something like that) and ever since he has been asking the seme to train w him but the seme is dense. It turns out the uke has been in love w him for years and he has changed so much because of him. Idk if this help but thanks in advance!!