Monster Fighting Instrument with Red Eyes

What is justice? What is evil? In this dirty world, the so-called justice has long since disappeared! Kindness, compassion... All are just excuses for cowardice and incompetence! Since there is no one to save me, I will come in the name of a monster and wipe out all the sins that God has no time to punish! Ps: This article belongs to the time-travel zone system. The protagonist is invincible and has a harem. The first world is the Red Eye, and subsequent worlds are to be determined... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.