Is Yakin Byoutou hentai?
English title: Night Shift Nurses
Yes
Rated Rx (Hentai) on MyAnimeList.

OVA · 2000 · 10 episodes · Rx - Hentai
Hentai
On a forbidden hospital ward, the head doctor performs madly erotic experiments, stripping the nursing staff of their uniforms, inhibitions and self-control... until even he is shocked by what he uncovers! (Source: AniDB)
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