Je-yeon is confused about her emotions toward Woo-hae, and Tae-rin doesn't know how she feels around Seok-ju. Woo-hae and Seok-ju continue their brotherhood amid the awkwardness between them and Pil-do. Meanwhile, Woo-hae gets an extra checkup as an anomaly shows up in his blood work, and the results come out at the worst possible time.

Both Je-yeon and Tae-rin develop feelings for their own love interest, and Je-yeon decides to take her shot with the perfect plan. However, things start to go awry as Je-yeon loses her job, and Woo-hae misses his date with Je-yeon as he collapses and is sent to the ER.

Upon hearing that Woo-hae is ill, Je-yeon feels lost and returns to her parents' home. Meanwhile, Woo-hae doesn't want to hurt Je-yeon and tries to distance himself from her. He also prepares for the worst and becomes cold to Nu-ri and demands that she meet her birth mother and reconcile.