C595

Zhantai Yue'er gave a bit of information to Thirteen. After learning a bit about the theory of flying, she finally confirmed whether or not Thirteen understood her.

Niu Thirteen hesitated for a while, then he nodded his head seriously.

"Understood!"

"Alright, since you've learnt the theory, let's do the actual combat!"

After she finished speaking, she instantly disappeared into the sky