DO YOU LIKE BRAHMS? - The TRUE story of the mythical Brahms-Clara-Robert Schumann love triangle

The new K-drama "Do You Like Brahms?" is based on the mythical love triangle between Clara and Robert Schumann and Johannes Brahms. Here's what the show got right, and what it left out.
Brahms's Piano Sonata 3 in F minor (recording from IMSLP imslp.org/wiki...)
Information from the following sources:
Clara Schumann: The Artist and the Woman (Reich)
Clara Schumann: An Artist's Life, Based on Diaries and Letters (Litzmann)
Johannes Brahms: A Biography (Swafford)
The Letters of Clara Schumann and Johannes Brahms 1853-1896 (Litzmann)
Schumann: The Face and the Masks (Chernaik)