Naruto System in One Piece - Chapter 510

The more he got to the Comprehensive world, Beiyuan Baiqiu originally thought it was just an ordinary Comprehensive daily world.

Who would have thought that after entering high school, unusual things would happen one after another, and I would awaken myself through the simulator.

Since then, Beiyuan Baiqiu has embarked on the road of being invincible.

[Demon Slayer, Campione!, No Game No Life, Problem Children are Coming from Another World…]

- Description from novelbuddy

Matthew grew up in a decent family filled up with hopes, dreams and big heart, but living a shitty life which were suddenly demised with the unexpected turn with a mishap. With the new changes of his body, he finds new powers and wondering into new dimensions. This new enigmatic power is suddenly taking soul form his body and making him something beyond of his imaginations.... His tasks are unclear but he has to take soul of each demon he meets in his path... With his powers he has bigger responsibilities in each of the dimension which is beyond explanation…

Luo Yi had secretly loved Chu Chen for quite a while and discovered that Chu Chen seemed to really like. . .

Um. . . really like certain 18+ things. . .

So Luo Yi decided to follow Chu Chen’s lead and walked onto a path of being f*cked. . .

- Description from Novelupdates

A serious accident caused the protagonist’s brain to have an unusual mutation. This changed the brain development that it opened the door to a mysterious universe. Not only he obtained a ‘god-like’ powerful telekinetic control and mental perception, he also had an abnormal analysis and memory capability comparable to super computer. Having such super brain, his rough life began.

Brain development progress 10%…….20%……50%….80%…. …100%

- Description from Novelupdates