Our Happy Days

Eun-ae receives an investment proposal for an AI program she has been developing for five years, while Gyeol, a renowned New York architect, receives an X-ray image.

Upon hearing the news of Kang-soo's lung cancer, Gyeol returns to Korea and recalls the time he entered Kang-soo's house; Ji-hoon confesses his feelings to Eun-ae.

Eun-ae is flustered when she realizes that her access to the Joy server is blocked and her office contract is terminated.

A family saga where a seemingly perfect man and an endearingly flawed woman collide while every generation fights to become the main character of their own life.

The Kangsu Group announces a succession race; Gyeol, who instantly becomes a target, refuses the race itself, but eventually steels himself; Eun-ae heads to Kangsu Construction.

Min-ho works at Kangsu Construction and competes with Seung-ri; Seung-ri suffers from a misunderstanding about Min-ho; Eun-ae stages a one-person protest.