WorldEnd: What are you doing at the end of the world? Are you busy? Will you save us?

Starry Road to Tomorrow (1x3)

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Explaining the relationship between the Fairy and the Holy Sword, Willem shows Chtholly a different way to use Seniorious in battle. However, he soon collapses to the ground due to the poor state his body is in... "Trying to find a way for you to avoid opening the Fairy Gate and dying."