Looking for a manga where a little into the story the two main characters are stuck in this boat and they cant get out because the water will kill them. well the guy gets out to save the girl and when they get to the shore she turns around and hes just a skeleton. later he reappears as an enemy and she tries to get him back. the story ends with them being reincarnated with him as a girl and her as a man? maybe. thanks for looking.

Well the first half sounds like Kurohime, but I haven't finished it so I don't know how it ends.

that's exactly it thanks