The news is leaked

From MC's Perspective:

Several hours later,

A huge city surrounded by massive walls on four sides appeared. Seeing that my eyes gleamed with a twinkle. 

"Viper City," I muttered to myself. I never expected to come here sooner. After a few minutes, the bird monster entered the city and the middle-aged man guided toward the monster facility.

My destination is not here. Otherwise, I would have taken the time to explore the city alone.

A few minutes later,

The bird monster landed in front of the monster facility. After stepping down, I bid goodbye to the person before walking away.

The target location is 50 miles away from here. I can use my flight ability to cover the distance sooner. While hatching the plan in mind. I continued to walk on.

The streets look busy. I remember the last time we had to stop outside of the city wall before entering the city. 

But academy people have access to enter the city whenever they want.