Kindan no NTR Mokuroku ~Seijo no Kamen wo Hagasu Midara na Kinsho Choukyou~ RJ01669480

“Haruno Kurumi” is a pure and innocent girl whom everyone admires as the academy’s saint. The protagonist held secret feelings for her, but Kurumi already had a boyfriend whom she devotedly loved.

Then one day, the protagonist accidentally gets his hands on a “Forbidden Book” that can freely manipulate human reason and spirit. “That purity of yours, and your feelings for him—I’ll paint them all over completely in my colors.” Using the Forbidden Book, you strip away her pride as a saint, piece by piece. Refusing, resisting, and eventually succumbing to pleasure, she falls into becoming a “lewd female”—in a locked room, right in front of her boyfriend…

The record of corruption capturing the defilement of a saint’s purity and her lewd transformation begins now.