Tanjiro Kamado paused in his training, his gaze drawn to Muichiro, who inexplicably sported rabbit ears and a fluffy tail. "I'm late, I'm late, no time to say hello, goodbye! I'm late, I'm late, I'm late!" shouted Muichiro, clutching a pocket watch and sprinting towards the woods. Intrigued, Tanjiro asked Shinobu to watch over Nezuko and hurried after him.

Tanjiro followed Muichiro to a large rabbit hole and, driven by curiosity, jumped in. As he descended, his attire transformed into a light blue dress with a white ribbon bow at the back, complemented by a black bow on his head. Furniture floated around him—bookshelves, tables, rocking chairs, fireplaces, clocks, and a map of the globe—each more surreal than the last.

Amidst the flood, Tanjiro spotted a small white kitten, Charmmy Kitty, struggling in the water. He quickly scooped her up, and she gratefully licked his cheek. Exhausted, they fell asleep inside the bottle, only to awaken on a strange land where the sky and clouds were a riot of colors and shapes, and the trees bore vibrant flowers.

Tanjiro and Charmmy ventured into the forest in search of Muichiro. They encountered Giyu Tomioka, now small and seated on a mushroom, puffing on a hookah. "Welcome to Wonderland, Tanjiro," he said, blowing smoke rings that drifted lazily through the air.

Tanjiro and Charmmy continued their journey, navigating the enchanting yet perplexing world of Wonderland. With each step, they faced new challenges and met peculiar characters, all while seeking the elusive Muichiro. Their adventure had only just begun, promising mysteries and discoveries at every turn.