Ji-yoon feels butterflies after sharing drinks with Si-woo. He comes to her with an unexpected proposal. Young-sam's power tripping drains Ji-yoon.

Ji-yoon chooses to join the second-worst task force to dodge the worst, her boss. Ji-yoon and Si-woo are building a rapport when Ga-eul comes back.

Things end for good with Ga-eul, but Ji-yoon still clocks in. Her dynamic with Si-woo shifts leading up to the 'sphere ice refrigerator' presentation.

Ji-yoon feels uneasy seeing Si-woo and Soo-jin close, but an accidental find at his place leaves her confused. Later, No-ah sets her up on a date.

To suppress her feelings for Si-woo, Ji-yoon tries to leave the task force. But when he refuses to let her go, they develop feelings hard to ignore.

Ji-yoon and Si-woo start a secret romance. As the line between work and love blurs, Ga-eul reappears before a struggling Ji-yoon.

As the romance deepens, unvoiced thoughts and secrets grow. Meanwhile, Si-woo's failure to show up on Hye-ji's wedding leaves Ji-yoon anxious.

When Ji-yoon asks for some time, Si-woo takes Seong-min's advice and lingers near. Meanwhile, Home-AI demo day arrives, and so does the Demo Ghost!

While an unexpected event forces Ji-yoon to stay at Si-woo's, settling them into life's simple joys, her promotion sends Mr. Ko's envy spiraling.

Ji-yoon goes public to protect Si-woo, but intense public scrutiny backfires on them. Left with no choice, Si-woo makes a grave decision.

As Ji-yoon struggles with Si-woo's decision, Hye-gyeong discovers their romance. Will the two safely clock in for work tomorrow, and for love?