 If you liked
Koe no Katachi
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 ...then you might like
Jumyou wo Kaitotte Moratta. Ichinen ni Tsuki, Ichimanen de.
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Not entirely sure how to describe it, but both series have very similar energy. Both protagonists make mistakes in their youth and try to reconnect with childhood friends. They also both resign themselves to a life of misery only to meet someone that breathes new life into their lives.