Asleep (2015)

Terako is in the midst of an affair with a married man named Iwanaga as his wife lays in a coma. Terako's best friend Shiori earns a living as a "soineya"-someone who sells the act of sleeping in the same bed with people. When Shiori commits suicide, Terako is devastated and begins spending more and more time sleeping as she becomes overwhelmed with loneliness.