The Man, the First, the Romantic

Yuna suddenly finds herself transferred to the job of secretary to Sunhyung Cha, the managing director of the publishing house where she works. Already finding it hard to understand why she's being made to work for this director who never turns up for work, she falls under his spell and does the stupid thing of... spending a night with him! And who is this Jihoon Lee who's always hanging around her?

(Source: Webtoons, translated)