The world has been plagued with kidnappings and killings from gods from other worlds. Humanity has deemed important to tackle this issue and created the Bureau of Otherworldly Affairs, which prevents unlawful kidnappings and "accidental killings" from gods. The Bureau negotiates with the gods and kingdoms who need a reincarnated or transported cheat humans from Earth, checks and helps the heroes both on the other world and Earth; and finally, punishes those who break the agreements or cause problems on Earth using otherworldly powers.