Game Invasion: From the Start, I Have a Hidden Class

In his previous life, games invaded reality, monsters ran rampant, and humanity suffered terribly. Protected by his younger sister, Su Yun narrowly escaped disaster, but she died horribly in the jaws of a beast. To bring her back to life, he became a god of slaughter, cleared the game, and earned a chance to be reborn. In this life, he vows to protect his sister and the Xia Kingdom!