So in this manga, the protagonist is a guy who in the past was comforted by a relative of his at this funeral and flash to the future and now he was asked to be a housekeeper for the same guy but once he got there was surprised by his appearance, cuz he looked really sloppy. He starts to clean the house and realizes he's gay, and in the first 10 or so chapters, actually has sex with him and becomes a couple with him. I believe, later on, they have a little fight over someone he used to love but they got over it and a little later they start to live together. Oh and forgot to mention that the sloppy guy is an author and there's a different guy that's interested in the protagonist that's also an author. I believe its still ongoing but its been a while since I read this. THANKS!

Not completely sure, but is it Fushidara na Hanatsumi Otoko?