The Female Assassin Pretends to Be a Lamb in the Campus - Chapter 12: Then you should call the police.

After transcending to a new world, Ye Xuan miraculously obtained the Swallowing System.

Dreaming back to the Tang Dynasty, being an ordinary person, greedy for money, lustful, debauched and free.

- Description from novelbuddy

Everyone wants superpowers, including Alden Thorn.But even if he's lucky enough to be one of the few humans granted magical abilities by the extraterrestrial System that's been running things on Earth for decades, his goal of being a battlefield support hero is still a long way off.He's got determination on his side and maybe a murderous alien desk clerk, too.The universe is a complicated place. Alden's about to meet it.

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