I'm Obviously Very Cautious, Why Do You Call Me Reckless?

[Upgrade flow + no heroine + no system + urban high martial arts + cool writing] "I am Du Tu, not a gambler. I will not bet on an uncertain outcome with my life." In order to save his sister who became a vegetable, Du Tu fought in the underground black market and made a living in the super city occupied by monsters... I don't know why, but his reputation spread and he became a reckless man. Strange... Why do you call me reckless when you are obviously very cautious?