Handler XX: Stock Maestro - Chapter 30: X, Y, Z

She was one of the best assassins of the modern world; a sly, black belly, cutely stupid woman. She passed through into a mysterious world and into the body of a trash young girl that everyone brutally reviled. Idiot and ugly, they don’t know that she was a Seven Element Elementalist with a Dual Cultivation Body. Various Spirit Beasts and Devil Beasts would rush to make a contract with her. See how she plays the world at the ends of her fingertips and exact revenge on the people who made her life a living hell.

Just who is this bewitching villain?

Hey! I’m going to talk to you about something! I am not just a bewitching villain, I am your soon to be husband!

The woman roared: Who wants you to be my husband?

Bewitching Villain: Well, if you don’t want me to become your future husband, then why don’t you become my future wife instead?”

This world is nothing without you. How could you leave me alone? Even if you reincarnate a millennium later, I will still be here waiting for you.

He was a tyrannical emperor born between the heavens and earth thousands of years ago. He did not hesitate to defy the world, to turn the world upside down, to expend his Spiritual Force only for her to reincarnate.

He was the Demon Emperor born between the heavens and earth, Just so she can reincarnate, he fell into a deep, profound slumber, “Little Zi’er, as long as you live, even if it costs my life, I will do it for you. Just to know that you live, would make my wounded heart……whole.”

- Description from Novelupdates

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 –

The Gura Gura no Mi is known as the strongest fruit in the world of one piece.

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!