One word determines life and death, one punch determines the world. He is also invincible and controls the world! He has the power over the world and dominates the battlefield, but he gives up his merits for one person. For you, I can go into battle with a gun and dominate the world. For you, I can disarm and return to the field, giving up fame and fortune!
The ending is too sudden
To be honest, it's not that great. Just give up.
Is it a single heroine?