 If you liked
Free! Eternal Summer
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 ...then you might like
Binan Koukou Chikyuu Bouei-bu LOVE!
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If you love having boyxboy ships, these both anime are the way to go! Both have really close bromance relationships, up to the point when you're thinking "just kiss already!" Free! is about swimming and Binan is about defeating everything with the power of love! but both share the similarity of five guys loving their dude friends.