Our Happy Days is a heartwarming family drama centered on the captivating romance between two strikingly different individuals. The story unfolds around Ko Gyeol, a perfectionist architect known for his arrogant demeanor, cynical attitude, and biting remarks. Beneath his harsh exterior, Ko Gyeol harbors an untold personal story that he keeps hidden from everyone. He crosses paths with Cho Eun Ae, a dedicated startup developer committed to creating a humanistic AI world. Despite facing mistreatment at home, Eun Ae maintains an incredibly bright personality and infinite positivity, making her a beacon of light. As these two navigate their contrasting lives, their budding relationship promises both challenges and growth. Adding another layer to the narrative, Ko Gyeol's older brother, a director at a strategic planning department, is deeply devoted to a manager within the same company. This series beautifully explores themes of overcoming personal struggles, unexpected love, and the true meaning of family happiness.