Sixteen-year-old Ling Yuan is the strongest mercenary codenamed "Zero" in the "Tower" organization. He leads twelve brothers and sisters who depend on each other for life and death to carry out the darkest mission. After the tower was destroyed, he returned home with only his grandfather and sister with scars all over his body, and entered Seiran Academy as a transfer student. He thought he could finally be an ordinary person again - but the shadow of the past never let him go, and in this seemingly peaceful city, everyone was living, choosing, and struggling in their own way. When darkness falls again, he must decide: to carry everything alone, or to learn to be loved.
Very unique!