The Masquerading Sister

The Marshall brothers finally find their long-lost sister, Aurora Marshall, who had been missing for thirteen years. However, it turns out that the girl they found is actually Aurora's friend, Maple Wells, who approached the Marshall family in order to benefit the children at the orphanage. The three brothers gradually uncover Maple's true identity and, after initial suspicion, come to accept her, forming a bond as they learn to understand her reasons for impersonating Aurora.