Romeo x Juliet, ef: A Tale of Melodies. Recommendations
Both animes are mostly based on romance, although Ef is also mystery while Romeo x Juliet has fantasy.
While the theming and setting are very different between Romeo x Juliet and ef: A Tale of Melodies, the two are very similar in the areas that matter the most in both of these anime; their love stories are exceptionally well done and tragic.
With that in mind, it's important to understand that Melodies tells two love stories at once. One of Kuze, a slowly dying man who prefers to keep his friends and loved ones at bay, contradictory to his self-proclaimed title as a ladies man. However, this policy of emotional isolationism is challenged when Mizuki, a lively and carefree girl falls in love with