Corrupted by Darkness

[Warning: Futanari Ahead]

Laura was taking a nice swim at the beach near Aozora City. Right after she was done swimming and turned into her human form as she was about to meet with her friends, she suddenly found a black pearl with a low purple glow laying on the sand of the beach.

She carelessly picks it up without thinking as she holds it up to her face to get a better look at it to find out what it is, but the pearl starts glowing brightly which almost blinds her.

Something was very wrong as Laura couldn't let go of the pearl from her hands for some reason as it felt like the purple glow was invading her mind, suddenly her Mermaid Aqua Pact and her Heart Kuru Ring were floating in front of her if being held up by an invisible unknown **** as they started to have a purple aura just like the black pearl as the black pearl flew into her Mermaid Aqua Pact and fusion together.

Then, her Mermaid Aqua Pact had changed color, the peach-coloured seashell with pale pink and marine-blue edging resembling waves was changed into a black seashell with cyan edging resembling waves.

The Heart Kuru Ring then attached itself into the new black Memaid Aqua Pact which usual triggered Laura’s transformation to turned her into her magical girl Alter Ego Cure La Mer, but it was completely different, instead of the bright rainbow colors that usually covered her body during the transformation, it was dark colors instead.

Her eyes widened in horror as she watched her transformation unfold in a way she had never seen before as the darkness consumed her. Her magical girl clothes morphed into something darker, more menacing. The light blue top with white frills and gold accents had transformed into a black bodysuit with transparency on her breasts, stomach, and some parts of her legs. Her purple skirts were replaced by a skirt that looked like made of used condoms, her platform open-toed sandals were transformed into cyan high heels, and then she grew a long cock between her legs turning her into a futanari.

After the transformation was finished, Laura’s mind was consumed by the darkness during the transformation as her mind was replaced by a new personality that is dominant, cruel, lustful, and, sadistic as the old Laura was gone replaced by the new evil Cure known as Dark Laura or Dark La Mer.

Her eyes now glowed with no signs of humanity or mercy, she felt the power of the darkness pulsing through her veins, filling her with a sense of perverted excitement and dominance.