Had I Not Seen the Sun

Revenge after a terrible traumatic past, SA. Kinda similar love stories because only love was the only one good thing in main lead's adult life

It has lots of similarity but also a bit different.
Girls in both series get scared for life.
They have a guy who is willing to help with revenge. Both has part 1 and part 2.
Had i never seen the sun was more tragic and more emotional imo.

In a way similar but one is tragic without real healing and the other one is more focused on healing from misfortune.
Both guys are labeled as trouble and girls make friends with them. Both ml have bad life at home and not having enough money.
Tbh "Had i not seen the sun" is a mix of "Better Days" and "you are desire"

Both dramas share same writers, feature abusive parents, tragic love, and sadness; one has time travel, the other thriller .

Kang Eun Su has never dreamed of an extravagant life, simply wishing to be happy with her husband, Park Do Jin, and daughter. However, after Do Jin is diagnosed with cancer, Eun Su struggles to make ends meet with her part-time job as a supermarket cashier. Her life takes an absurd, dark turn when she accidentally stumbles across millions of dollars' worth of illegal drugs – and decides to sell them instead of reporting them to the police. Eun Su finds an unexpected partner in Lee Gyeong, her daughter's after-school art teacher, who moonlights as a drug dealer in the Gangnam club scene. But as Eun Su and Gyeong find success, the cops begin to notice, including Jang Tae Gu, the head of narcotics investigations, leading to dangerous choices and an uncertain future.