Cold-blooded Undercover Master - Volume 1 Chapter 1207 Obtain A Secret Technique

What the hell? That menace who bullied me since I was six years old, actually became a pretty girl after three years of living apart? And she even ran to our agreed duel location to confess to me, hoping that I can become her boyfriend?!

A mysterious and strange world, a human civilization lacking power, and a horrible and turbulent world of human life, Luo Kai survived humblely as a prisoner. Pain and suffering honed his will. War and killing promoted his growth. He suddenly looked back. Is already one of the most powerful beings in this world.

- Description from novelbuddy

Crossing to One Piece world, he became Roger’s younger brother.

Unexpectedly, Gol-D-Roger who was in his fifties had a teenage brother. But he was so weak.

Fortunately, at the age of sixteen, he actually found himself with a possession soul system.

He had attached to the master IP man, also to the White Phoenix and to Ge Nie with his strong ability of the Hundred Step Flying Sword.

If you think that he can only Purchase these? Then you’re wrong!

Pain, Itachi, Ichigo Kurosaki, as long as there is money, any soul can be Purchased.

- Description from Novelupdates

«Bleh.» — Imp. An Imp, a monster known to kill with a grin, a demon of the world, a creature of incredible might! Something that no force in the world can stand against! At least that’s what the Main Character would like himself to be, the reality is very different, however.

Exactly that Imp stumbles along a path of unfortunate fortunes and grows through it, in a world that hates its very existence.

It grows more intelligent, more powerful, simply better at whatever it needs to do. Amongst other things, that includes raising children, killing Soldiers, and carving wooden figurines for money.