In the third year after the great barrier came, strange beasts from the mountains and seas roamed everywhere.
Others run away when they see the evil monster, but I hold the ancient "Mobile Book of Mountains and Seas" in my arms. I know all the monsters' fatal spots.
Others fight for equipment and courage, but I can use ordinary objects to seal alien beasts into my body and act as a thug.
I am the eighth generation demon sealer. My grandfather left a message: Collect all the remaining pages of the twelve volumes and guard this world.