Ogenki Clinic

Ogenki Clinic (お元気クリニック Ogenki Kurinikku?) is a 1987 hentai manga series by Haruka Inui which was originally published in Play Comic. The manga was adapted into an anime OVA series. There was also a live-action version, Welcome to Ogenki Clinic. The plotline revolves around the quirky (and perpetually horny) Doctor Sawaru Ogenki and his beautiful nurse, the busty Ruko Tatase, who help patients through their problems, and the cure almost always involves sex (something Ogenki doesn't approve on too well).

Ogenki Clinic is a comedic hentai that often employed visual metaphors for the doctor's cures. Referring to sexual intercourse as a game of pinball, or illustrating a penis as an actual missile or gun are just a few examples of the manga's humorous scenes.

It was later adapted into an anime OVA series.