My Sister Who Regressed Wants My Fiance delivers a gripping mix of political intrigue and emotional tension. Nereis’s struggle to assert herself despite her sister’s manipulations creates a layered conflict that keeps the story engaging. The tension between Nereis and her sister is heightened by the Ghost Duke’s growing interest in Nereis, adding complexity to the narrative.
The story effectively develops Nereis’s character as she navigates the political and emotional fallout of her sister’s regression. Her efforts to protect her position and relationship with the Ghost Duke showcase her strength and determination. The underlying mystery behind her sister’s regression adds an additional layer of suspense, making each chapter’s progression feel meaningful and unpredictable.
Plot of My Sister Who Regressed Wants My Fiance

Nereis is forced to accept an engagement to the Ghost Duke on behalf of her sister, who has always been favored by their father. However, when her sister unexpectedly returns and claims she wants the engagement for herself, Nereis’s position is threatened. The situation becomes even more complicated when Nereis discovers her sister’s diary, revealing that she has regressed and is using her knowledge of the future to alter the present.
Despite her sister’s manipulations, Nereis begins to form a bond with the Ghost Duke. His growing interest in Nereis creates tension within the household and challenges the established power dynamics. Nereis must now navigate both political pressures and emotional conflicts as her sister’s true intentions start to unravel.
Chapter 40 is expected to focus on Nereis’s response to her sister’s increasing interference. As the Ghost Duke’s loyalty is tested, Nereis may need to decide whether to confront her sister directly or rely on the Duke’s support. The revelation of her sister’s regression could lead to a turning point in Nereis’s strategy to protect her engagement and secure her future.
My Sister Who Regressed Wants My Fiance Chapter 40 Release Date and Time

My Sister Who Regressed Wants My Fiance Chapter 40 is scheduled for release on Tuesday, April 1, 2025. The release times for different regions are as follows:
- Japan Standard Time (JST): Wednesday, April 2, 2025, at 12:00 AM
- India Standard Time (IST): Tuesday, April 1, 2025, at 8:30 PM
- Greenwich Mean Time (GMT): Tuesday, April 1, 2025, at 3:00 PM
- Philippines Standard Time (PHT): Tuesday, April 1, 2025, at 11:00 PM
- Korean Standard Time (KST): Wednesday, April 2, 2025, at 12:00 AM
- Eastern Time (EST): Tuesday, April 1, 2025, at 10:00 AM
- Central Time (CST): Tuesday, April 1, 2025, at 9:00 AM
- Mountain Time (MST): Tuesday, April 1, 2025, at 8:00 AM
- Pacific Time (PST): Tuesday, April 1, 2025, at 7:00 AM
- Australian Eastern Standard Time (AEST): Wednesday, April 2, 2025, at 2:00 AM
Where to Read My Sister Who Regressed Wants My Fiance Chapter 40
My Sister Who Regressed Wants My Fiance Chapter 40 will be available for Korean readers on Naver. An official English translation is not yet available, so readers are encouraged to follow updates from official sources. Supporting the official platforms ensures high-quality translations and helps the creators continue developing the story.