The Throbbing Ward Late At Night: Embarrassing Play In The Delivery Ward (2013)

Blurb:
Kanako Mochidzuki, who works as a nurse, and Dr. Arita, of internal medicine, recently started dating. In the hospital room beds … in the examination rooms … wherever they can find a place where others won’t see, they spend every day making out and blissful. But eventually, the surgeon Tokieda spies one of their secret meetings! On her way home, Kanako is ambushed and knocked out with some strange ether, and when she wakes up, she finds herself … in the operating room?! With her hands and legs bound to the delivery table, Kanako, who can’t move an inch, is set upon by the grinning Tokieda!! Don’t miss the climax this nurse never saw coming!

Source: www.anisearch.com/manga/35017