One day, Ibuki Arakuni learns that his childhood friend, Honeko Akabane, is being targeted by assassins! Both of them are in Class 3-4 at Sosoji High School, and Ibuki is ordered to protect Akabane for one year. His goal is to ensure that she graduates safely, but he must do so without her realizing it. And so begins his secret life as a bodyguard at school! However, there seems to be more secrets within "Class 3-4"...?! This is the start of a new and exciting action school comedy!!