Mouse is the younger brother of Iron Brother, who is engaged in debt collection business. He accidentally falls into Iron Brother's mysterious disappearance of the 'Oolong Formation'. Through entanglement and struggle with various relevant characters, gradually stripping the threads from the chaotic plotThe cocoon finally revealed the truth, and the mouse successfully escaped from the 'Oolong Formation', allowing justice to be upheld and the bad guys to receive the punishment they deserve.