Does anyone know this manga

I don’t really remember much but I remember this one chapter where the bottom is pregnant and in his dream he sees his dead grandpa asking if he wants to stay with the top and then a small puppy appears and plays with the bottom while in the dream and at the end the grandpa tells the bottom to go back to reality and the puppy tries to follow the bottom but grandpa doesn’t allow and when the bottom leaves the dream the puppy turns into the baby that he’s pregnant with but the bottom miscarriages and understands why the puppy wasn’t allowed to go with him