I can't be invincible when I travel through Tokyo

Qiao Shuya traveled to a parallel world, modern Tokyo, Japan, and gained a passive ability that allowed him to become stronger simply by killing enemies.
After more than ten years in the world, he realized that this world was too dangerous, with demons invading and dangers lurking everywhere. Qiao Shuya only wanted to rely on his own abilities, like an experienced dog head, stacking thousands of layers of passive skills before going out again.
Layered people, layered souls, those who develop are all superior to others. They have to kill the demons quietly to develop, and then surprise everyone.
Thus, a legend spread among the demonic circles of District 11, Tokyo: if you see a Hanged Man with blue flames emitting from his fists, run away immediately, or he'll charge at you and unleash hundreds of punches as if he hasn't fought anyone in ages...

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