 If you liked
Diamond no Ace
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 ...then you might like
Grand Blue
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First you may say what are similarities of those anime if they are totally different genres? Well there are some, first it's sense of humour and lot's of jokes. Another one is that both of them are anime about young people that are exploring and learning life in different ways. And oh last but not least Sawamura is loud person, same like many of characters used in Grand Blue series.