[IP] Please Help!

Does anyone know the name of a world hopping novel where the MC has a system and figures out that has long as the romance target’s experiences emotional upheaval and certain plot points are “technically” followed she doesn’t have to suffer.

Example: in one world she is supposed to be the younger twin sister who meets the Male Lead after being hit by a car on the day her sister left the country only to be used and abused as her sister’s substitute and discarded when her twin returns. However, when the MC enters the world she lets the Male Lead get hit by the car instead and assumes her sisters identify and tells him her younger sister took her place so she could stay in the country without the Male Lead’s mother finding out.