I Hit the Big Boss at the Beginning, Is It Still Too Late to Run Away Now?

Wearing it as a sexy phoenix bird with bulging front and back, the system allowed me to accurately hit the head of the most ferocious overlord in the beast world. He woke up from his deep sleep because of my intrusion, his eyes were straight and cold, and he could swallow me into his belly in one bite. In order to survive, he had to forcefully occupy his lair. Until one day, the protective shield disappeared and he evolved into a dragon. I was ready to run away, he, he, he...