Jisoo and Seo In-guk prove they have just as much chemistry off-screen as they do in “Boyfriend On Demand” by putting their friendship to the test with this costar quiz! Do they know each other's love ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. While Jisoo and Seo In-guk ...