Return of the Adopted Child in a World of Bloodline Supremacy

In a realm dominated by bloodline supremacy, magic is an exclusive privilege of the elite. However, as demons invade, the noble’s magic proves to be ineffective, leading the world towards doom. The last beacon of hope for humanity is Colin, the mightiest swordsman of slave lineage. Just before meeting his demise, he acquires the "Forbidden Book," which grants the ability to learn magic to anyone. Upon awakening, he discovers that he has traveled back five years into the past, to his youth. This time, in order to reshape the future for the better, Colin aims to dominate the world as a "Magic Swordsman," wielding both sword and magic, to rescue humanity from the demons!