I just crossed over and my younger brother is Doflamingo

Roy traveled through the world of pirates and became the eldest brother of Doflamingo, the Don Quixote clan, who had just taken over the identity of a Tianlongren.
At the beginning, he faced the pursuit of troublemakers one by one.
Fortunately, it is bound to the soul capture system, which can fuse the souls of powerful people from different worlds and gain abilities.
Integrate Fanma Yujiro's soul at the beginning and get rewards [Extreme Physique: Ghost Back]
Integrate the soul of Feicun Ji...