Kai - Aizawa, a teenage boy sets his goal to defeating every mutant in the world. His dreams gets accomplished in the end but he needs to go through vigorous training to become strong.
Kai must find a way to overcome this hardship and learn to become strong. From the pain he undergoes and the betrayals he endures, Kai still has a strong heart which will teach him to be true to himself and Continue to become what he wants.
With the help of his friends, he is assured to become what he wants.
One of the things pushing him to become even stronger is to protect everyone he loves.
On the road to become a mutant slayer, he encounters other mutant slayers who are further stronger and ranked high in the ranks but we are yet to see what Kai can do in the near future.
