Double Life (Nijû seikatsu) (2016)

Tama is a graduate student. She lives with her boyfriend Takuya. She becomes influenced by lectures about French writer Sophie Calle and begins to follow her neighbor Ishizaka. Tama soon discovers that her neighbor Ishizaka is having an affair. She becomes excited about discovering his secret. Her relationship with her boyfriend Takuya and her professor Shinohara changes.