Dekoboko no Waltz

The manga centres on a female teacher who is around 180 centimetres (about 5 feet 11 inches) tall and a man who is about 160 centimetres (about 5 feet 3 inches) tall as they aim to perform a beautiful dance. The inexperienced pair have lessons in secret. Though the effort is enjoyable, the waltz they perform is clumsy.

(Source: Anime News Network)

Note: The chapter count includes an epilogue.