hey guys~ The yaoi mangas I'm looking for this time are a bit hard to find, as there's so ...

hey guys~
The yaoi mangas I'm looking for this time are a bit hard to find, as there's so little I remember about them. That's why I really need your help this time ^_^

1. I only remember an extra chapter involving the protagonists.
Its a "what-if" story if Seme and Uke were a dog and human, and vice versa.
On the first part, when one is a dog, (not sure if its the seme or uke) when he was told to WAIT before eating the food placed before him, he will really wait even if it takes a long time.
(I think the human master forgets he gave the order to the "dog" and only remembers after a long time has passed)
On the 2nd part, when setting was reversed, when the dog was made to WAIT, he couldn't, and (guessing at this part) stares at his master with sad eyes, which makes the human give up.

2. There's a Seke which is an heir to a vast family fortune, a Seme who becomes his customer, and an Uke that becomes a housepet.
All I remember is that I've this manga is at least ~5 years ago....
The Seke is guilty of causing the death of another guy, and the Seme gigolo bears some sort of resemblance. I'm sorry its been so long, I don't remember much.

[important] I think in the end an Aunt just gives the Seke an allowance every month in exchange of the Seke giving up his rights to succession, and so he continues to buy the services of the Seme and the Uke continues to live as a pet.

Also, I'm not sure if there's a threesome, but I do know that the Seke also laid his hands on the Uke housepet. Hope this helps, I really want to reread them. ^_^