Sosuke Sagara is a soldier who belongs to the most powerful Special Forces “Mithril”.
To protect Japanese beautiful high school girl “Kaname Chidori”, he supposed to be a body guard of her every day and night.
However, he causes troubles; he mistakenly shoots guns in the school building and bursts the locker.
Even though he is hit by Kaname with a huge Harisen anytime he caused trouble, right after that he’s in another trouble.
Fighting over the hidden secret of Kaname who is a normal high school girl, an annoying battle which includes justice, foolish, tear, laugh, love and drama has begun!