 If you liked
Boku dake ga Inai Machi
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 ...then you might like
Re:Zero kara Hajimeru Isekai Seikatsu 2nd Season
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Both are series that center around time travel. While Erased is more of a real life situation with supernatural and Re:ZERO is fantasy, both feature the protagonists desperately trying to do what they can to save their loved ones.
Both are also pretty dark and feature some mystery.