Watch Me (2007)

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.

Unfortunately the movie Watch Me is not yet available on HBO Max.