Akatsuki no Goei Trinity

The story takes place a little later in the future. The police has no control and a lot of crimes happen here and there. To deal with this problem, the government has established a bodyguard training school.

Kaito, the main character, enters the school and becomes a bodyguard through hard training. On the last day of school, other students look happy, but he doesn't. "I'll hire you as my bodyguard. Good luck," she just says arrogantly. "What...?" Just looking at her makes Kaito think... He just wants to protect her...