In an era of dwindling spiritual energy, the Matchmaking Stone—which randomly assigns marriages—has malfunctioned, and the Red Thread of Fate snaps at the slightest provocation. Newly appointed junior matchmaker Su Yun is unlucky enough to be sent to the mortal realm to help a domineering CEO, who reportedly snapped his own red thread 99 times, find love. Invisible to everyone, Su Yun follows the CEO daily, orchestrating every possible romantic coincidence. Wears the same dull black suit to work every day? Unacceptable! Must improve fashion sense! Thus, Su Yun clocks in, earns money, subscribes to fashion magazines, and picks stylish outfits for the CEO. Too blunt with words and bad at sweet-talking? No way! Must master 101 ways to dish out flattery! So, Su Yun anonymously sends the CEO guides on "How to Properly Sweet-Talk Your Crush," teaching him how to flirt online. Rubbing his hands with glee, Su Yun eagerly awaits the CEO’s successful blind date. Little does Su Yun know, everything he does while invisible is seen *clearly* by the "CEO"—who’s actually a heavenly god in disguise! Hmm, what to do when a tiny matchmaker is working so hard to secretly fawn over you? To claim or not to claim—that is the question.