The Onikirimaru is a powerful object of the Gods. It is a God's first resolution, which has the power to destroy the world. The Tamayori Princesses have made it their duty to seal this dangerous artifact away. However, the power of the seal has weakened because of the fact that Baba-sama's time as the Tamayori Princess is coming to an end. Therefore, Tamaki must become the new Princess, and seal the Onikirimaru once again.
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