 If you liked
Fate/Zero 2nd Season
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 ...then you might like
Grisaia no Kajitsu
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This is a very specific comparison, but Grisaia no Kajitsu’s protagonist has an origin story that parallels much of what we see in Kiritsugu’s early childhood. Grisaia has a story based more around a scientific world that has many elements and seems often times unfocused, but the attention to character development also is a similarity between these two series.