The Hollow-Echo Girl and the Order of Guardian Knights (Vol. 01-Vol. 09)

The set includes 8 volumes of The Girl of the Empty Echo and the Knights of Protection (Vol. 01-Vol. 08).

"Our team, known as the Knights of the Void, exists to protect you. As your companions, your knights, we will always stay by your side."

After being infected by a virus, a girl gains special abilities and becomes companions with the boys and girls known as the Knights of the Void.

Though endless challenges await them, she and the knights who protect her continue to grow.

It is because they care that they want to protect her; it is because they care that they refuse to yield to fear.

Can the chosen girl and her knights overcome every obstacle and turn the tide?