After Breaking Off the Engagement, My Breathing Became Invincible

My fiancée just broke off the engagement and called me a waste. The next second, my breathing became stronger. While others are practicing, I am sleeping. Enemies came to seek revenge, and I was basking in the sun. The whole world thinks that I am a flat fish, but they don't know that every time my heart beats, it makes the earth tremble. No matter how strong you are, I will be invincible just lying down. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.