Tres Marias: Sannin no Sei Shojo - Season 1

The remote island's convent is struck by an unexplained malady, prompting a summons for Dr. Fuwa. Accompanied only by his nurse Megumi, the doctor arrives to find his reputation for exploiting female patients precedes him, leaving his practice nearly deserted. The afflicted are all young nuns-in-training. While Dr. Fuwa sees an opportunity to indulge his habits with each patient, the investigation into the true cause of their severe illness proceeds.