Seesaw (2011)

Name: Seesaw
Director: Keihiro Kanyama
Released: 2011
Cast: Keihiro Kanyama, Keigo Oka

1h 10m IMDb

Makoto, a Japanese teacher, and Shinji, once an aspiring actor, have been living together for two years. When Shinji's friend gets married, he too begins to think about marriage. Makoto believes that marriage changes nothing, and thinks Shinji is naïve for thinking it does. She's too busy with her work and not interested in settling down. But one day, Makoto begins to realize she might be pregnant.