Don't Be Cool, the System Will Explode

In the modern era of high martial arts, strange beasts run rampant and the weak die. After three years of physical training and no progress, my fiancée, the school beauty, broke off the engagement in public, making me the laughing stock of the whole city. The next second, the invincible system was activated, but it roared loudly: [If you dare to act cool and show your strength, I will blow myself up on the spot! Others rely on the system to show off, but I rely on the system to show off. Punch through the alien beast and say it hits the wall and dies on its own; The test broke the city record, and I cried and begged the examiner to rule me for cheating. My ex-fiancée thought I was useless and went to lick a genius. But the Iceberg Goddess of War blocked me every day: "You are very strong, stop pretending." Until the aliens break through the city, the city will be destroyed. I moved my wrist and spoke calmly: "Enough pretense." The system screamed in despair: "No - it's going to explode!!"