Kuchuu Teien
Seme butd the uke, uke is a prostitue, sementreats him bice, they fall in love, get together, ule wishes the best for the seme wants him to have kids so after a talk with semes father he runs away, seme catches him, they go to father, seme gives uke the ring the father gave the mother, everything is happy and alls good
Yona Yona, Amaku
So they meet as step brothers and then one night the uke has the seme as a client they go the whole way seme wants them to be exclusive because he fell for uke, they keep being together, seme confesses and uke quits his job They never bring up being step siblings after the first chapter, why couldn't they be vo workers or something, they didn't need to be siblings
Mizuiro to Pinku, Sore kara Daidai