EntropyF

After failing to become a Tama-Artist, a group of people who wield Rei to control mystical jewels known as Tama, Lucien "Lucy" bitterly lost his mother to the "kyuketsuki" left in her by his father. He planned to seek revenge against those who made his mother's life a living hell. 

However, an unfortunate incident led to his death, and he ended up in the first Yōkai no Mon theater, where he gained power at a terrible cost. 

Lucy's actions become increasingly malevolent, but the unexpected news of his long-lost daughter forces Lucy to reexamine his actions. 

In a world where those with the Nana no Tsumi bodies, and reijuus are craved for, will Lucien's actions affect those around him, and hopefully find his salvation?

Villain Rehabilitator

Sora pouted, "Ah! You're so quick at it; couldn't you do it slowly this time?"

Eito, the stunning boy with horns, willingly, demonstrates both slow and quick movements.

The blue-eyed girl exclaimed, "I got it!"

...her excitement was short-lived, as she failed to fly even an inch.

Eito, with his amber eyes, seemed amused by her failure, knowing she couldn't fly without his Tama's assistance.

Just as Sora was about to give up, Eito secretly used his Tama on her. She slowly lifted off the ground, exclaiming, "I did it! I can finally fly! Did you see that, Eito-kun?!"

Sora's flying was a bit clumsy, with her legs kicking and head tilted upwards. Eito assisted her briefly before drifting away to join the other children.

M2's Underground Hall.