10-year-old Shigeki, owns his own room for the first time. From his room, he sees a girl living in a big hill top house. Shigeki instantly fell in love with the girl. Her name was Yayoi. Shigeki buys a telescope with the help of his father and starts watching her. But after a while, Shigeki has to move away. He wrote a love letter to Yayoi, put it in her post and left town. Shigeki grew up and still watching Yayoi. One night as he watched Yayoi, a man appears in her room. When he sees the man kissing Yayoi, Shigeki goes crazy. He married a woman named Misaki even though he didn't love her. But the two has a son and are living happily. Just as Yayoi married and had a daughter. Even then, Shigeki kept watching Yayoi. As Shigeki turns 50, his eyes are weakened by using his eyes too much for all those years. His view is clouded and he can't even see through the telescope anymore. One day, he receives a box full of notebooks. They were the diaries that Yayoi had kept.