Shiroki Tenshi-tachi no Rondo / Hardcore Hospital

Based on the visual novel from the studio Black Package Try.

At Date General Hospital, the nurses don't just help you feel better, they help you feel pleasure beyond anything you've ever imagined. Dr. Date, the hospital's director, is personally in control of this hand-picked group of "special nurses", whom he trains in most seductive and sexual "therapy" technique: Saeko may be the vivacious veteran... Minako will be the hot and busty new recruit... and Sayaka may be the sweet and innocent virgin. Along with his homemade stamina drugs, these ladies are able to keep going, on and on...

But they can his nurses are hesitant to explore the murkier side of the profession. That's when Dr. Date has got to assume control... and his hardcore techniques will guarantee that they're willing to discover every aspect of a patient's body!