Toshiki, who works at a construction company, is forced to help his boss, who has just moved into the apartment across the street, even though it's his day off. The boss's wife is his former colleague Himari, a woman he had feelings for in the past. Feeling the distance between them and his unreachable feelings, Toshiki begins to peek into Himari's life from the apartment across the street. At the same time, Himari is also frustrated and troubled by her relationship with her husband. A few days later, Himari notices Toshiki peeking in, and the two of them slowly begin to grow closer...