Yu Chen, a medical student in Jiangnan, obtained a devil fruit system in the most desperate situation. The surgery fruit that can heal and kill people at the same time, the gravity fruit that can attract meteorites, the flame-flame fruit that can make fire fists invincible, the string-string fruit that can control puppets, and the shock-shock fruit that can shatter space...

This is a story about playing around in the city with the devil fruit system and becoming the strongest.