Invincible: Sweep Across Kyushu

Get system through time travel, The system didn't expect me to be so stubborn. Let it create a small cave for me at the beginning, I stayed there for ten years, and each day was like a year outside. Finally, the system finally kicked me out. I just discovered that after I came out, In this Kyushu continent, I'm already invincible! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.