Hunting Witches Starts by Transforming into a Mecha

"Those who practice magic will, sooner or later, be contaminated by magic and turn into monsters." "One of the most powerful and dangerous monsters is the witch." "Bai Lun, you have to be careful... Once you meet those witches, don't be fooled by their appearance... Do you understand?" "... Huh? Why don't you say anything? Are your hands still so cold? Are you okay!" The blood moon rose high, and the blond elf master spoke closer and closer. "What is this... - Wait, wait a minute! What does this mean?" She lowered her head, only to see a cold steel fist buzzing in front of her heart. "Teacher, you are possessed..." Bai Lun shed his flesh and blood expressionlessly, turning into a black mecha. … Traveling into the game he designed, Bai Lun found that the entire world was polluted by magic. Strange beasts, monsters and demons were everywhere, and witches were causing trouble everywhere and committing many crimes. Only he, a man who can transform into a mecha, can purify their sins. In order to save this world in dire straits, I have no choice but to transform!