Hi!!! I'm looking for a manga, the uke loved his friend, but his friend is straight and g...

Hi!!! I'm looking for a manga, the uke loved his friend, but his friend is straight and get married, uke thought seme is in love with that friend too. So when that friend die, uke and seme sleep with each other. Oh and there's a son of their dead friend, who look exactly like him. The seme thought uke love the kid, so he leave, but turn out the one uke love is him. And they get together. Something like that. Please help me find that manga