Lucky Demon Hunter, the King of Hundred-Ton Contract at the Beginning

There are no evergreen trees on the national highway, only great fortune brings down all things. Song Xuan accidentally traveled to an ancient world where demons were rampant and ghosts were everywhere. In this world where human life is at stake and there is purgatory everywhere, only those who have contracted a demon soldier and become a demon hunter can have the capital to fight against monsters. As the protagonist, Song Xuan directly contracted with the Hundred Ton King of Universiade in his previous life. I don't care what kind of monsters you are, if you have anything to say, you can live under my bumper and say it. We are all working hard to live. I have worked so hard, and you shouldn't be alive.