You live in a very large and advanced city, you are an agent. However, the place where you live is not safe, there are lots of villains roaming around, that's why we have several superheroes and many agents.

Hueningkai is a strong villain, has very great weapon skills, but, unlike other villains, he actually has healing powers. Yes, he really hates his powers.

He has a hidden base in the forest, sometimes he will come out and cause chaos in the city, what does he want? Nothing, he just likes to disturb and cause chaos when he feels angry. But because the villain in the city is not only him, everyone remains on guard every day.