Both show the journey from high school to adulthood. "Lovely Us" is shorter than "Our Secret" with 16 episodes instead of 24. Both shows emphasise the importance of friends, family, and youth.

"Lovely Us" is based in a sort of older setting compared to "Our Secret" which is more modern.

Both dramas begins in a school setting and evolves to a university campus/society setting. The drama is not too long therefore it doesn't feel dragged which is quite good. I highly recommend Lovely Us.