"I apologize," says Maria as she flees from her vow ceremony at the convent where she was raised for 16 years. She has received another letter from her enigmatic benefactor, "G." Despite feeling isolated in the world, "G" informs Maria that she possesses a relative attending Hakuhou Academy who requires her guidance but cannot disclose this person's identity. However, Maria encounters numerous obstacles while attempting to join and search for her family member at Hakuhou; primarily, the school is exclusively for boys.