Delusion () is an upcoming South Korean romantic fantasy television series based on the eponymous webtoon series by Hongjacga, directed by Han Jae-rim, and starring Bae Suzy and Kim Seon-ho. It is produced by Showbox and Magnum Nine, and scheduled for release on Disney+ in 2026.
Premise.
Set in 1935 Gyeongseong, the story follows struggling artist Yun Yi-ho, who is commissioned by the reclusive elderly Madam Song Jeong-hwa to create a portrait. In a rare moment, she allows him to see her, revealing a young woman before him. However, she requests that he paint an elderly version of herself. Hidden among the previous artist's paint tubes is a troubling letter. Yun Yi-ho discovers that no artist has left Madam Song Jeong-hwa's home alive or in a sound state of mind. The mystery deepens as he contemplates what she is concealing and the potential consequences of completing the portrait.
Production.
Development.
In June 2021, Showbox announced plans to produce dramas based on webtoons, including "The Witch" and "Delusion". On September 2, 2021, a film industry insider reported that director Han Jae-rim had begun producing a drama adaptation of the latter. The original webtoon, a mystery horror period drama set in Gyeongseong in 1935 and Shanghai in the 1800s, tells the story of a mysterious vampire, and gained significant popularity since its serialization on Naver in 2019. The specific platform for release and the timeline for filming had yet to be determined at the time.
On May 23, 2025, Disney+ confirmed that it would release "Delusion" as an original series in 2026. The series' production cost was approximately billion.
Casting.
Ryu Jun-yeol and Han So-hee were initially considered for the roles of Yun Yi-ho and Song Jeong-hwa, respectively, but decided not to participate in "Delusion" after their romantic relationship ended in March 2024. On July 30, 2024, an official from Management Soop stated to "Sports Chosun" that Bae Suzy received an offer to appear in the drama and was reviewing it. Initially, she had been offered the role first, but declined due to scheduling conflicts. After discussions, the production staff decided on a dual lead system featuring Kim Seon-ho and Bae.
On May 23, 2025 Disney+ released script reading photos of Bae Suzy and Kim Seon-ho and officially confirmed their casting.