Fubuki from One Punch Man.

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As a psychic her power if very dangerous to the human society.
So we figured out the best way to prevent that is to give her a direct brain treatment -- so called brain fuck -- to destroy the potential danger within her brain.

But she didn't make it though. She died while giving the treatment and her muscle twisted so bad that one of our scientist almost got his penis bitten by her death choke. After that he said: the tighteness and the twist of her throat is so excited as he recommend everybody to try this out even they would risk losing their penis.

Luckily her asshole and pussy became very tight and moisture to fuck so we finally decide to turn her body into a sex toy for everybody.