Dice In The Darkness: Cthulhu Calls - Chapter 309: Ling Ishikawa Returns

Death is sometimes not the end!
Dead prison!
This is a magical prison. It has the ability to draw the souls of the dead people of the world, and it also enables people to gain the ability of the souls of the dead.
When Qin Song woke up, he was shocked to find that he had come to the world of One Piece, and even more surprised that he found a prison in his body…..

- Description from Uukanshu

A hundred years ago, he was a genius of the Emperor's Domain who made even the God of War wary. He was unparalleled in both alchemy and martial arts. However, his friend betrayed him, leading to his untimely demise.A hundred years later, he rose from being a dandy young master, starting everything anew. From then on, the world witnessed the emergence of an extraordinary genius.“Boss is even more ferocious than a wild beast!”“Boss values friendship above all else. He is forever my best friend!”“Kevin, no matter how long it takes, I'll wait for you. I won't marry anyone else!”“Don't ever provoke that man of calamity. That guy is a beast!”“I am Kevin Anderson, who dares to defy me?!”

A great demon king who came from another world to conquer Earth. To save the Earth, Li Luyou could only first take care of this great demon king… a little girl proclaiming herself Her Imperial Princess.

- Description from Novelupdates

Lucien, a guy who has nothing but the desire to save his mother. To get strong enough, he makes a contract with the demon of L.u.s.t. And now, only by making a great harem, will he gain the power to protect those dear to him.