Boundary Keeper: Earth's Last Guardian

When alien forces descend upon Earth's borders, humanity's survival rests on the shoulders of one man. Xiado isn't your typical hero—he's a young guardian driven by unwavering loyalty and sharp intellect, standing alone against an endless tide of extraterrestrial threats. As invasion after invasion tests his resolve, he must evolve from defender to legend. Can one man's courage be enough to shield an entire world?