This summer, the humid and sweltering days continued relentlessly. Kenichi, a cram school student living alone, couldn't stand the heat and opened his window, only to discover for the first time the existence of Asahi, a beautiful housewife living in the room opposite his. From that day on, peeking at Asahi became Kenichi's daily routine. However, one day, he witnessed Asahi, who had called for air conditioner repairs, about to be raped by the repairman. Acting on impulse, he threw something at the opposite window to save her. Later, Asahi invited the brave Kenichi to her room, saying she wanted to thank him...