Tres Marias: The Three Holy Virgins - Part 1

Story

The mentor, Fuwa, is skilled but a womanizer, so he was constantly having trouble with the nurses and got expelled from the university hospital, leaving him with too much time on his hands. Then a call comes from a senior from his university, asking for help with a patient suffering from a strange illness. The patient is Makoto, a novice nun. Sister Kate is her attendant. Makoto's symptom is that she loses consciousness as if dead once night falls. Suspecting the cause lies on the island where the patient lives, Fuwa heads to the island to investigate. The church's priest is a splendid man revered by all the islanders, and assisting him are Kate, along with the novice nuns Satsuki and Ririka besides Makoto. Makoto's illness must be connected to the island, so why don't the others show symptoms? Fuwa asks Makoto, "Is your period regular?" "What do you mean?" Makoto replies. She has absolutely no knowledge of sex. Forgetting his duties, Fuwa's lecherous heart began to stir...