one day, record-breaking heatwave struck. yuki's air conditioner suddenly broke down, and she was at a loss after trying to call for repairs everywhere but finding no availability. luckily, she remembered that her husband's uncle had previously been an electrician, and he agreed to come over immediately. the next day, her uncle, jinbei, arrived. jinbei, who had been celibate for a long time, became aroused by yuki, whom he was meeting for the first time.