He, since he was a child, practiced anti-sky tactics with foreigners, entered the most mysterious special forces, and became a frightening and terrifying killer.
After a failure, he retired early, but he became the bodyguard of the daughter of the school girl!
The arrogant school girl, the enthusiastic and unrestrained royal sister, the gentle and considerate nurse, the lovely and pure loli, and the cold-hearted female killer, etc.
Merry but not obscene, let’s see how he traverses inside and outside the school…