One day, Qin Xuan gets a Detective Agency System, and his life changes completely.
In the Prince of Tennis world, he has the powerful support of the Three Doors of Selflessness. "Hyotei, Rikkai Dai, sorry. I accepted Tezuka's commission, so I have no choice."
In the One Piece world, he gets all kinds of Devil Fruits. "Cracker, someone's got a problem with your name and insists on changing it to Snickers. What are you going to do about it?"
In the Dragon Ball world, his ki is invincible, and with Senzu Beans in hand, the world is his! "You dirty old turtle... Ahem, Master Roshi, would you like to see the latest issue of Paradise on Earth?"
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.
