Miss Kuroitsu From the Monster Development Department - Season 1 Episode 11
The Sacrifice Willingly Attending the Banquet of Evil Gods Must Either Be Eaten and Accept Their Role as Sacrifice or Devour the Evil Gods and So Become One

Kuroitsu tags along on a retreat for Agastia executives in order to learn more about what makes them tick. But while the team enjoys their hot springs resort trip, an unexpected enemy seeks to take advantage of the relaxed atmosphere!