Sister by chance, Heiress by fate

A young girl abandoned by her mother for a new husband finds solace with a close friend who takes her in. Their lives take a drastic turn when a mysterious foreign boy approaches them, offering an unexpected opportunity. He invites them to travel to his country and enroll in a prestigious private school for the wealthy, under the condition that they sign a binding contract. Along with the boy's older brother, they are thrust into a world of privilege, mystery, and intrigue. As they navigate the challenges of their new environment, they encounter moments of joy, secrets hidden within the school, and form bonds with new friends in their assigned section. Their journey is one of resilience, discovery, and uncovering the truth behind the mysteries of the academy.