According to Nielsen Korea, the final episode of Unexpected Sister aired with a viewership rating of 7.1%.
This is not only the best achievement of the work since its broadcast but also the TV series shown on Monday and Tuesday with the highest achievement in 2025 of ENA, up to now. It is also the second highest rated film in ENA history, after ky la Luat su Woo Young Woo (highest rating of 17.5%).
According to the film's development, Kim Young Ran (Jeon Yeo Bin) became stronger and bolder in the battle with Professor Ga Sun Young (Jang Yoon Joo) - the illegitimate son of the ex-wife of Chairman Ga Seong Ho (Moon Sung Geun).
On the day Sun Young took the position of Chairman, information about her planning to kill the Executive Chairman's stepchild, Ga's younger brother Sun Woo (Lee Chang Min) and the Executive Chairman to appropriate the assets of Gasung Group was revealed.
According to the Station President, he had hidden his own life to expose his wife's illegitimate child. Meanwhile, with the support of lawyer Lee Don, Young Ran took the upper hand in the inheritance battle, and forced Sun Young to pay for his crimes.
The film ended with Baek Hye Ji's wedding. After a period of silence, Young Ran suddenly appeared at the wedding to congratulate his best friend, and at the same time met single father Jeon Dong Min (Jinyoung). Here, Dong Min officially proposed to Young Ran and wanted to protect her for the rest of her life.
Despite a happy ending, "The Ancestored Lady" is still embroiled in many controversies when the content of many long-running, predictable episodes, the male-female love line is lackluster, not bringing much "chemistry". However, Jeon Yeo Bin - Jang Yoon Joo's impressive acting is a highlight. The couple's confrontation makes the film more dramatic.
