 If you liked
Waltz no Ojikan
|
 ...then you might like
Ballroom e Youkoso
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Both series are about characters who are taking the first steps into the world of ballroom dancing. While Waltz no Ojikan is a shoujo and Ballroom e Youkoso is a shounen they both focus on the idea that someone who seems unremarkable at first can change through their dedication to dancing, something they never considered before.