The story follows childhood friends who grew up in the same neighbourhood, supporting each other through life's ups and downs and learning the value of family, friendship and love.

The FLs in both dramas are older than the MLs.
The women value their careers and work hard to achieve their goals. The male characters both have a role to play in the professional success of the FLs.
The MLs start out in the professional world and want to succeed in their dream as a Designer in The Rational Life and as a musician in My Fated Boy.