Number One Dungeon Supplier - Chapter 4: Grade 2 Meant Something

This is a world where science and magic coexist.

Some people here seek powerful magic, and some seek eternal truth.

A science tyrant who came from another world, started as a little librarian, with magic in his left hand and truth in his right, kicking the door of the new century with one kick.

Some people call him the forerunner of magic, some say he is the founder of science.

Some people describe him that way.

In the new century, Blair is a symbol of evil.

- Description from novelbuddy

Betrayed by his sister. Betrayed by chosen one's humanity. Betrayed by the Gods.That was how the life of Leonard, the Defier of Fate and the world’s greatest heretic, came to an end.When demons invaded human lands, he received a revelation from the Goddess. She commanded him to act as a spy, to infiltrate the enemy ranks and expose their secrets for humanity’s sake.To fulfill this mission, he had to sacrifice a part of his soul. He accepted a demonic contract, surrendered his soul, and became a demonic human. Risking everything, he provided critical information to the humans and helped them turn the tide of battle.But then, he had a shocking discovery.The war was nothing but a gambit between various gods and before he could act, the war was stopped out of nowhere.In an unexpected turn, humans and demons put aside their hatred and signed a peace treaty.Before Leonard could make sense of it, he was betrayed. Both demons and humans joined hands to kill him.“Fuck! If there is a next life, I swear I will tear you gods apart!”With this scream, he thought his suffering was finally over.But…When he opened his eyes again, he found himself in the body of Kael Veydrin, the son of the Grand Duke of the Heizen Empire. But this new life was no different from the last.His sister wanted to get rid of him.Born with clogged vessels and no talent, he was nothing but a disappointment.A subject of fun and ridicule among the fellow nobles.Despite rebirth, nothing seems to change.The cursed fate.The distorted history smearing his name.A world that was against him.Leonard, now assuming the identity of Kael, let out a low chuckle.“Don’t worry, Kael. I will have revenge for both of us.”“They called me heretic right? I will show them how a true fucking heretic acts.”Follow Kael's journey, as he fights against the fates and injustices to drag the ones ruling above.

Some say reincarnation is a blessing, but for me, it's a dreadful curse. Cursed with endless reincarnation, I've been reborn as a villain 137 times. And all 137 times, I've been toyed with and killed by heroes who are far more cruel than the said villains... If I can't win no matter what I do, then I'll crush those so-called heroes at their very roots. - Quality Fan Translations, Made by Fans for the Fans - Villain Takes Over The Academy

In regards to the MMORPG Cross Reverie, Sakamoto Takuma boasted an overwhelming strength that was enough for him to be called the Demon King by the other players. One day, he gets summoned to another world with his appearance in the game. There, there are two people that insist “I am the real summon master.” Takuma gets slave-turning magic used for summoned beasts cast on him by the girls –