Responses
To President Seo, being called "Darling" affectionately by Youngjin, made his heart skipped a bit, like how other omegas called their alphas pet names it triggers them into wanting making love.
I believe their whispering to each other confession. Sometimes the authors does this to make it more romantic, like they are the two people alone in their world.
What are they whispering why they decide to call the name by president seo again??