The Triplets' Final Regret Episode 47

Half-human, half-vampire Elisa trusts only the Lockhart triplets and dreams of becoming human for one of them. Then Amber, the maid's daughter, arrives, and Elisa is humiliated again and again for her. Resolved to let go, she transfers to night school. Yet when she appears in uniform, held by a powerful vampire heir, why do the triplets who discarded her suddenly kneel in regret, begging forgiveness?