One day, an adventurer ventures deep into the forbidden forest in search of a magical medicinal herb. He finds a path lined with deep, dangerous mud pits, and amidst them, a cheerful laugh can be heard. Tagby appears, half-emerging from the mud pit, with a mysterious smile and playful eyes. She pretends to sink, hoping to see if the stranger will rush to help. But when he reaches out, she jumps up, laughing. The encounter sparks both distrust and interest in each other. The adventurers try to find their way, but Muris keeps appearing to annoy them. Eventually, the two must work together when the true forest demon reveals himself.