"How were Gaia Memories created?" "Why did W begin to fight?" To answer Tokime's questions, Shoutarou quietly begins to tell a story. He speaks of his meeting and parting with a man he admired and called his old man—his mentor, Soukichi Narumi. Mysterious people called Dopants, who utilized the powers of Gaia Memories, had begun appearing in the shadows of Fuuto, the windy city. A young Shoutarou had become an assistant of the detective Soukichi and, though called half-baked, began to follow in his footsteps. Unaware that, in addition to his detective work, Soukichi was secretly acting as Skull, Shoutarou began to grow frustrated with his mentor. That was when the Narumi Detective Agency received a phone call—a request from Hell inviting Shoutarou and company to a fateful night! When Shoutarou tracked down Soukichi to deliver the "trump card" bestowed by the mysterious caller, what did he see? Shoutarou and Philip. The one detective made of two and the night when Kamen Rider W began. That whole story will finally be revealed. (Source: Official site, translated)

Ji Miaomiao, a young woman just starting her career, is betrayed by a friend and left with a mountain of debt. While fleeing from ruthless debt collectors, she accidentally falls from a building. On the brink of death, a mysterious figure transforms her into a cat. By a twist of fate, she ends up being adopted—by none other than her own boss, Lu Chengze. Thus begins her strange and magical 100-day life... as a cat.

Hu Bayi and his companions, commissioned by Professor Chen, travel to Coral Temple Island in the South China Sea and hire Ruan Hei and his apprentice to embark on the Trident to search for the Qin Emperor's Bone Mirror. After their adventure, they crash into Guixu, where they discover the ancient mirror within the shipwreck and learn that Ruan Hei is Duoling's enemy. While resting after their escape, a mysterious figure suddenly appears, wielding a club, approaching Uncle Ming, who is on night watch.

In order to find his cherished partner, Wu Liuqi returns to Xuanwu Country and faces those forgotten fragments of memory. The dusty truth brings pain and anger, but now he is no longer alone. What is the purpose of having power? This time, Wu Liuqi has to make a new choice for his life...