 If you liked
Free!
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 ...then you might like
Free! Eternal Summer
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if you liked the first season, the second one only gets better as the characters are forced to break out of the highschool anime bubble universe and confronted with the reality of graduation.
just don't expect it to be a "sports anime" the same way haikyuu or knb are. free is just a coming of age drama about guys who happen to do sports and it only gets more melodramatic from here on out :)