Double School Kids

Three children, Erisha, Sara, and Tobito, were raised by Sister Mary at a rural orphanage after being abandoned. Sister Mary reveals they all died during an epidemic as infants but were resurrected by an angel, who tasked them with growing up to assist it. Now, they attend a city boarding school as per Sister Mary's request. Near the school, a ruined chapel holds a hidden confessional room, where it is said that confiding one’s problems can lead to miraculous outcomes. The three have found the entrance and use it to discreetly hear their classmates' concerns and help resolve them.