How Does Blue Exorcist - Knights Of The True Cross Expand The Anime Story?

A 25 years old boy named John is suddenly shot by his friend, which results in his death, but is reincarnated again as the new Demon King. Unfortunately, he agains dies in a battle. This time also he is reincarnated but as a human. Follow Vis' adventure as he gets revenge, becomes a demon and makes his own harem.

Being the only child to the Queen of Castle Grey, lost within the confines of mount Trenon, Kilvic is made to learn a number of things best suited to the heir to the Elzcrid bloodline at the hands of tutors handpicked by his mother. However, his fifteenth birthday sends him beyond the reaches of his mother’s domain. She has tasked him with the duty of learning more. Understanding greater things than she can teach him, greater things with which to cope with the curse upon his bloodline as she had been taught by her father and mother. Finding himself in a new kingdom, in an academy designed for only the most elite of mages, Kilvic is tasked to survive the new things he will come to learn, while struggling with the chaos of human association, as he comes to understand that while he may know a great deal about the world from the castle archives, it is a different thing to experience them. The association between people isn’t as easily deciphered as the books made them seem. As he struggles with the task of becoming a mage and a student along with surviving new friendships, failure threatens him at every turn and people prove pettier than the books would have him believe. Yet, despite all these, somewhere hidden in the shadows of the kingdom, a creature stirs, taking from the academy the one thing it values most. Kilvic must survive the trials of the academy, keep his friends, best his first enemy, and ensure that what stirs must not cause more damage than the kingdom can bear, lest the supremacy of Castle Grey be called into question in realms beyond that which most know. And all in time to attend the Winter Hall Fest.

"I won't let them live!" "I will be the strongest as a demon wielding warrior!" Arya Santanu, an ordinary young farmer from a village in the west of the island of Yawadwipa. He found a pitch-black stone as big as his body in a forbidden forest. Little did he know that the stone was a dimensional prison for a top-level demon named Asura.  Unexpectedly, Arya Santanu made a promise with the demon Asura to avenge all his demon brothers. This brotherhood of demons formed a sect of criminals in the land of Yawadwipa. They are known as the group of Thirteen Black demons.  Arya Santanu's hatred intensified when the Thirteen Black Demons destroyed his village and killed his beloved brother. What was originally a one-sided agreement turned into a grudge.  How can Arya Santanu become the strongest? follow the excitement only in the devil's hand knight.

When Mizuko slipped into the other world, she landed in the arms of a mischievous demon prince, Kenshi. New to the world, she didn't know he was a demon as he looked to her like he was a decent person. Because Kenshi helped her first, Mizuko decided to ask him for help in finding a way home while she fulfills the dead mage's request in relaying the message to the King. But no demon in Souzou helps unless they get something in exchange. A promise, it is what Kenshi wants the most.

Daemon who was once a useless, powerless man despised and bullied by others, worked his way to the top, facing many challenges and opposition from crooked and twisted ministers, sinister and wicked demon Lords who are trying to bring him down, becoming the Demon Emperor, a figure who now holds the highest authority. He swore revenge against the humans - the ones who ruin his family, massacred his innocent family and left him orphan. There's a big organisation called the Demon Hunters whose aim is to rid the world of demons, and they were the ones who killed Daemon's family. Amidst the chaos, he encounters Victoria Bennett, an unsuspecting human who stumbles into his realm searching for her missing brother, igniting a forbidden romance between two souls from opposing worlds. However, their love faces insurmountable obstacles as both humans and Victoria's own family relentlessly strive to tear them apart. Will Daemon and his loyal Demon Lords succeed in their audacious mission? Can they find solace in one another, despite the deceit and dark enigmas they harbor? Can the flame of love burn brightly between a human and a demon, defying the shackles of an ancient curse that has endured for countless millennia? And in the ultimate test of devotion, what choice will Victoria make: her blood ties or the irrevocable love of her life?

Serra is a normal senior high school student who works really hard every night and weekend to pay off her parents' debts from loan sharks. But when she couldn't keep up with payments anymore, she decided to end her life. Surprisingly, she woke up in a different light-- in another world. What's more shocking was when she is addressed by one of the people as the demon king's bride.