Xiao-yu intends to take revenge on his frienemy Ke-le. He returns to school with the plan to confess his love in disguise for vengeance. However, a train accident changes everything.
After seeing her friend’s disturbing social media posts, Riko tries to intervene to help her but fails to prevent her from dying a mysterious, violent death. Convinced there is more to the story than a suicide, Riko dives into a world of memes, influencers, and posting for attention. As the pile of bodies grows, and Riko faces her own possible curse, she and her friends travel to Taiwan to find the source of this demonic social media killer.
One day, while Seiya was calling everybody on the phone to tell them "It's me, thank you" on the rooftop of a building, a strange creature with emerald-blue fur, something he had never seen before, descended from the sky. The creature, along with its companions, claimed they had come to exterminate human race. However, through conversations with the humans they encountered, they gradually began to understand each other...
A 21st-century time traveler must return from reclusion to aid the emperor he once guided, as a new temporal threat jeopardizes the empire they built and their complex bond.