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Summary
In the four timelines Isagi met him, it only took one for Kaiser to know that it didn’t matter what kind of world he was in, as long as Isagi was in it.
Or: Researchers Isagi Yoichi and Michael Kaiser have been researching the possibility of parallel universes for years, but they always seemed to be at odds, and with no end in sight. Until one day, Isagi found an unopened room in the institute that would ultimately transport him into another world, or four, that would change his perception of time and how precious it is once he knew it would always run out.