Entertainment Life With A Camera - Chapter 211:

He died on the wedding of the girl he had a crush on, after a long and successful career. After convincing Yama to send him back to the world, he decides to fix the areas in which his life went wrong. Realizing the lack of love and romance in his past life, he sets out to conquer the hearts of various women.

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates

The strongest Demon Lord dies, and reincarnates as a human. Not only that, he because of various incidents turns into the hero’s best friend.

Follow his journey as he tries to help the hero escape his fate, and on the sideline to conquer the continent while he’s at it.

Zane was just a working-class adult with a passion for one thing—Cursed Bloodline Online, the once-revolutionary game that had faded into obscurity. After six long years of grinding, he was finally on the verge of ascension—until everything changed.His bloodline suddenly reset.The world itself changed immediately after.And without warning, everyone between the ages of sixteen to thirty vanished—pulled into the game’s world.Now trapped in the Realm of Bloodlines, Zane finds himself different from the others. While most awaken standard paths to power, he inherits a hidden Bloodline Class—the Cursed Bloodline of the Vampire Progenitor, the same bloodline that mysteriously appeared on his account just moments before the transfer.Alone, hunted, and feared as one of the last of a forgotten, despised race, Zane must fight to survive. To grow stronger before the world turns on him. To uncover the secrets of his cursed identity. And to discover what force brought them all into this deadly game.Slowly but surely, he forgets himself from the past, overtaken by the life of the body he now inhabits and the mysteries that surround it, becoming the very thing that caused the gods to curse his race in the first place.