Bae Suzy dated Lee Min-ho, who starred together with Kim Woo-bin in the highly popular drama Heirs (2013).
Lee Jun-ho & Lee Yoo-bi make cameo appearances in episode 4 as a star couple. Both actors previously worked with Kim Woo-bin in the movie Seumool (2015).
The name "Joon" means "ruler, talented, handsome".
The series reunited Bae Suzy, Jin Kyung and Kim Ki-bang who starred in the historical drama Guga-ui Seo (2013).