so I'm looking for this anime where a guy ends up traveling through different parallel dimensions in order to find the girl he loved. Apparently no matter what dimension he goes to, the girl always ends up dying in an accident with all of their friends, always leaving him the only survivor. Also I think one version of him, ends up going mad causing a rip within the dimensions, which only the girl can fix. And there was something about this girl from this one specific dimension being the original girl from which all the other hers from parallels dimensions were formed- that's why it has to be her to fix the dimension rip. This girl is 12 I believe and the guy finds her when he is already in his 20s-30s and brings her to his dimension. Also the girl has blue hair, and the guy that takes her has white and long hair. So yeah... I pretty much remember everything except the title -____-''''
Many thanks in advance!

Noein

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Yes! Thank you! that was fast