Taisetsu ni Ningen toshite Sodatete Itadaita noni Onaho de Gomennasai♥

The story takes place in a world where the number of "masochistic females" who desire to be treated like "onaholes" (living sex toys) is increasing.

Rin Shiroyamabuki is a pure, virgin heiress ("Ojou-sama") born into a strict and upstanding family. However, she catches the eye of her School Principal, a man possessing a "huge handsome penis." He uses every trick in the book to entrap her.

The story is framed as a battle between a "Huge D*ck" vs. a "Weak Virgin Rich Girl." It focuses on her corruption: Will she be able to escape, or will she succumb to the pleasure and "fall," accepting her fate as a living sex toy?