The entire class was suddenly summoned to another world—. While his classmates received glamorous professions like Hero or Saintess, the gloomy loner Yoichi was granted a class that made everyone burst into laughter: "Erotic Sage"!? Dismissed as incompetent and swiftly exiled, Yoichi soon discovers that his power is actually the "ultimate growth skill" that gains experience points by feeding on pleasure! The curtain rises on an other-world harem fantasy where he rises to the top by captivating the beautiful girls among his classmates!