Mumu and the Vacuum Cleaner

S1, E2: Sakurako's apartment has become MuMu's new learning environment. His next topic to study: the paper-bag vacuum cleaner! Following the microwave and the refrigerator, Sakurako now finds her vacuum cleaner disassembled as well. Needing to try and repair it, she must ask the university's home appliance club, the "Mankind Regeneration Research Society"!