In the ancient horizon lies a beautiful city of joy, where its people have always lived peaceful and happy lives under the protection of the Joyous Codex. However, where there is light, shadows inevitably follow. On a stormy night, a stray black cat, seeking shelter from the cold, accidentally took refuge in a tower. After unintentionally glimpsing the Joyous Codex, it transformed into a woman. Overwhelmed with excitement, the black cat lifted the Joyous Codex, but as soon as it was opened, a terrifying event unfolded: the evil dragon, long suppressed by the codex, soared into the sky. Lightning flashed and thunder roared across the heavens. In an instant, the once beautiful and serene city of joy was reduced to ruins, shattered into fragments. All its residents were turned into various objects, and the codex vanished without a trace.