The air conditioner that I had been using for many years finally broke down during this hot season. I contacted a contractor, but they said they could not come to fix it until two days later. I ended up spending the day alone with my slightly naive big-breasted sister without an air conditioner, but I never expected that because of the heat, my sister would start wandering around the house in the tiny swimsuits she had bought in bulk during the supermarket sale (sweat). Where is the little brother who gets excited by seeing my sister's boobs! I told myself, but my sense of ethics is also half-broken...