A Journey Through the Martial World After Transforming into a Loli

What are the consequences of using a game modifier to change data? Computer crashes, game freezes? No, no, those are minor issues.
Our protagonist was directly transported to another martial arts world. Even just that would be wonderful, since so many time-travel novels either feature characters wielding power over the world and enjoying the company of beautiful women, or wandering the martial arts world with beauties by their side.
Meanwhile, a cute little girl sitting by the river let out a mournful cry of resentment—"I'm a boy! How am I supposed to build a harem and roam the world like this?"