Xu Zhiyi paid eight thousand yuan out of her own pocket to buy a washer-dryer combo, with three roommates paying two hundred yuan each per month to enjoy washing, drying, consumables, and maintenance services. Ten months later, Tang Kexin instead turned the accumulated six thousand yuan usage fee into a purchase price for the machine, demanding three-quarters of the management rights. Xu Zhiyi brought out the receipt, transfer remarks, and usage records, refunded the new period's fee, and cleared the authorization. After losing convenience, the roommates saw the value of the service through queuing, drying, and division of labor. Tang Kexin still crossed the rules, using the machine without permission and bearing the repair costs. After the storm, everyone finally understood that paying to use does not equal owning, and convenience cannot become a reason to cross boundaries.