Looking for a manga

Im looking for a bl (probably) manga about a guy who dresses up as his dead sister and meets her fiance and I think they get together? The reason why I'm looking for it is because a bl I'm reading rn has a character who has a similar story with the artstyle looking eerily similar (or maybe it's just in my head)
To the manga I'm looking for so I'm putting on a tin foil and wondering if there's a connection haha
It won't show up when I press the authors name so I'm probably just making up theories any help would be appreciated