Confident and straightforward, Saera has never met a man she couldn’t win over. But Keum-gwang, a childhood friend of her younger brother who has grown into a handsome CEO, turns out to be the one exception. After quitting her job and joining his company, Saera suddenly gains the ability to see men’s affection levels through a test game app. With such an advantage, winning Keum-gwang over should be easy… yet no matter what she tries, his affection level refuses to rise. Just what will it take to make Keum-gwang finally fall for her?