The Transformation Diary Of An Improper Monster Girl

"I have walked on thin ice all my life, abiding by my oath to remain pure, and never breaking my oath!"
"...you asked them what happened?"
"Hey! Regarding the Holy Knight, can that be considered breaking the vow?"
"Besides, Monster Girl is not a human being!"
.
Herbert was reincarnated.
Good news, it's the Paladin.
Bad news, he has taken the "Purity Pledge" to remain pure throughout his life!
Well, I was put on a magic ring at the beginning.
I have it in this life!
Not only that, he was also assigned to a prison to educate and reform the most vicious and terrifying alien prisoners.
Frenzy dragons, fallen angels, dark elves, sirens, devils, demons...
Shall I transform them? Real or fake?
Weak and helpless, he was no match for these monster girls. He could only hug his knees and tremble in the corner.
Just when Herbert thought he could only abstain from lust for the rest of his life and spend his whole life depressed in this prison, he was forcibly blessed by a certain evil god and gained a special charm that would fascinate all monsters.
After that...
Things started to look different.
When Herbert entered the prison again, he found that the eyes of the monster girls who were originally hostile to him changed when they looked at him - they were all lusting after my body! ?
It was also at this time that he suddenly realized that they might not be as scary as they looked.
Very valuable for renovation!
.
This book is also known as "Evaluation Guide for Interracial Girls" and "Developing a Girl Who Played with Monsters in Prison"
[Happy Direction] [No Morality] [Relaxed Direction]
The work has been completed with a total of 5 million words. It has never been a eunuch, and its character is guaranteed!