The Happiest Time of My Life
- Title: 내 생애 가장 행복한 시간 / Nae Saengae Gajang Haengbokhan Sigan
- Previously known as: 거래 / Georae / Deal
- Genre: Romance
- Episodes: TBA
- Broadcast network: SBS
- Broadcast period: 2017-???-??
- Air time: Wednesday & Thursday 22:00
- Original Soundtrack: The Happiest Time of My Life OST
- Screenwriter: Choi Ho Chul
- This is a pre-produced drama.
- This drama was originally scheduled to air after Entertainer in June 2016 but the slot was replaced by drama Wanted.
- Initially Yoo Yun Suk and Ji Chang Wook were chosen as the male lead.