Lin Su, who just created a boxer character in the virtual game "Hunter," is transported to the game world's Tokyo and becomes an unknown NPC. When he discovers that a great catastrophe is only a month away, Lin Su makes a bold decision. Attribute points from completing tasks? Max out attack! Attribute points from monster leveling? Max out attack!! Attack is the best defense; as long as he crushes all enemies, no one can harm him! A month later, when many silly players arrive and various demons begin to appear frequently, people suddenly discover that Tokyo has an invincible boy who tears demons apart... "Let me punch you, just one punch." ...In the rainy night...