Ma belle-sœur, mon alliée la plus forte

Cherry Jepsen is the Jepsen family's biological daughter who was switched at birth. After 18 years, she returns home, and everyone expects her to compete with the daughter raised in her place, Rudy Jepsen. Instead, the first thing Cherry does is cling to Rudy's side as an ally. Through their growing bond, Rudy is moved by Cherry's genuine affection. The two sisters unite to crush their enemies and each finds sweet romance along the way.