 If you liked
3-gatsu no Lion
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 ...then you might like
2.43: Seiin Koukou Danshi Volley-bu
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Both anime are centered around the coming of age stories for a socially awkward main character (mc) The greatest similarity, imo, is with the overly melancholic and depressing atmosphere used to tell both stories.
You could say;
"While you go through the joys and sadness of life with him, he seems to be fighting a recurring theme of melancholy throughout his life."
and it would he true for both/either mc.