Similar story, both have pregnancy involved. The female lead gets pregnant after one night. She has the baby without the male lead's knowledge. They meet again years later.

The stories are very similar. The MC used to date, but because of an outside force, they had to break up. Both MLs hold a grudge over the FLs for breaking up with them, both are extremely jealous when it comes to the FLs being with other men, and they still love the FLs very much. Both FLs work for the MLs, who became successful businessmen. MLs use other women to make FLs jealous. FLs are hardworking who work hard to provide for their family

-They are both crazy shows
-ML is obsessed with the FL
-ML is basically a stacker too
-Both are interesting shows that no matter how crazy they are you can't stop watching it