A novel where the main character is a mercenary

A university student who went on a vacation with his classmates was caught and became a mercenary. Later, he tattooed a broken flag on his temple. He was a sniper. There were also many experts from other countries. One of them was called Butcher.
They were wolves. F * ck.

Answer 1

Mercenary novels usually contained the following elements:

- Mercenary career: The protagonist is usually a professional mercenary who performs various missions around the world.
- Confrontation and Combat: The protagonist usually excels in various conflicts and battles to demonstrate his military skills and tactical wisdom.
- Human nature and emotions: The protagonist usually has a complex human nature and emotional life. He faces various challenges and choices while carrying out his mission.
- Adventure and Exploration: The main character usually needs to carry out various adventures and explorations, explore unknown areas, search for treasures, etc.
- Plot: The protagonist usually has a complicated plot and plot development. He will encounter various characters and enemies, as well as a series of complicated events and twists.

For example, the protagonist of the Warhammer 40K series was a mercenary who performed various missions on different planets and fought various enemies while facing his own difficulties and choices. Dark Fantasy: Mercenary is a story about a mercenary's adventures in a dark fantasy world.