[7] The series tells the story of Noh Young-won who is recognized as the country's best family psychological counselor.

[8] Bitter Sweet Hell was originally scheduled for release in the second half of 2023, under its former title Gaslighting (가스라이팅; Gaseuraiting).

[2][8] Kim Seung-woo, who wrote and directed the 2019 film Bring Me Home, was initially announced to participate as the creator and director of the series.

After filming about five episodes of the series, reorganization began due to lead actress Kim Hee-sun's movie promotion schedules and the production company was changed from JPX Studio to Red Nine Pictures.

[19] In January 2024, it was announced that actress Yeonwoo had joined the cast, taking over Kang Hae-rim's role.