Demon Annihilation: Starting from the Seven-Day Invocation

I accidentally traveled to 30 years before Demon Slayer's original work, and looked at this world that was completely different from what I remembered. Ito Mizuki can only clench his fists and lead the Demon Slayer Squad to create a bright future in this dark era! Based on the seven-day calling method, you can create a method that suits you. Bottom string? Winding? It's time for Wuhan to come out and bask in the sun. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.