Personally I'd say anything with atleast a sad sidestory should appear in the relations. A sad moment or two is not enough imo. So Chrno is a no no and NGE is up to interpretation, personally I'd say NGE is a true borderline case. But that's just my 2 cents.
Success is commemorated; Failure merely remembered
ok clannad is tops them all by sad, serious season is heart breaking.
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so if anyone wants to join it and get emotional together please come and join us <3 http://myanimelist.net/clubs.php?cid=18987
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