This manga is the one I read a long time ago and can't remember its name now. At the beginning of the story, a girl (who had long black hair) woke up after falling out of her bed and saw that her house was in a very strange place. Also, she had lost her memory and couldn't remember anything about herself. At night, her body turned into a boy and the characteristics changed completely, like a different person. Later, the story revealed that the male personality and female personality were two people in the past and they were an eloping couple, somehow transferred to a different universe.

If anyone knows about this manga, please tell me. Thank you very much

Maze: Mega Burst Space

It's an anime too.

Wow, thank you very much! Exactly what i am looking for ^^

... I just want to say that I've also been looking for this manga for years with only a vague description of the plot from a friend. I HAVE FOUND IT !!!
Thank You!!

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