Sukimasuki (2015)
Original title: スキマスキ
Sukimasuki is a 2015 Japanese-language comedy movie directed by Kōta Yoshida, with a running time of 1h 22m. It stars Keita Machida, Kokone Sasaki and Masayasu Yagi.
Heisaku is a university student. He is obsessed with peeping on his neighbor Fumio through the cracks in her curtain. Fumio is aware that Heisaku is peeping on her and she even observes Heisaku through her window.