With the Yellow Robe on You, You Run to the Demon Suppression Division to Slay Demons.

Chu Feng traveled through twenty years and was running around delivering food all day long. He had almost forgotten the monster killing system that was silent in his mind. Until he actually bumped into the monster, Chu Feng had one thought in his mind: either he would kill the monster, or he would be killed by the monster. Seeing that the shop owner's life was hanging by a thread, he picked up the bone chopping knife and rushed forward, cutting off the demon dog's head with one knife. [Kill the demonized black dog, and you will be rewarded with a powerful sword. The sword will fly across the sky and be invincible] "Chu Feng, do all monsters deserve to die?!" "Nonsense, if it doesn't die, will I die?!" … "Chu Feng, is it my fault that I became a monster?!" "You are a monster once, and you will be a monster all your life! I am too lazy to reason with you! You don't deserve to listen!"