does anyone know this manga

anyone know a manga where the seme is a snake and he can change into a human and the uke is bald and they happen to meet and the seme stays with the uke and later on in the story someone captures the uke and they plan to execute the uke and the seme and uke have sex I think bc the uke thinks hes going to die and the seme takes something that makes people like the seme get strength?? or sumthing like that but right before the uke was a bout to die the seme becomes a dragon after he gained enough of something to become a dragon and saves the uke and dies I think then the seme "goes into a pregnant women's stomach" while shes having labor and becomes the child but he looks the same sense he "died" when he "went into the stomach" he was like a little ghost and then they meet when the seme grew up and I think they have sex again but that's all I remember is u know it plz share bc im been looking all of for it

srry if its soo long I wanted to give all I remember so it can be easier to remember if yall read it and know what its called