IU Perfect Crown has reached another clear milestone. The MBC Friday-Saturday drama, known in Korean as 21st Century Grand Prince’s Wife, recorded its highest nationwide rating so far with episode 6, which aired on April 25, 2026. Nielsen Korea figures placed the episode at 11.2% nationwide and 11.3% in the Seoul metropolitan area, making it a new personal best for the series. For viewers following IU and Byeon Woo-seok’s on-screen romance, the numbers matched what the episode delivered: a warmer, more direct step forward for Sung Hee-joo and Grand Prince Ian.
IU Perfect Crown Sets a New Personal Best
The main ratings figure is simple but meaningful. Episode 6 reached 11.2% nationwide, passing the drama’s previous personal high of 11.1%, which had been set by episode 4. The increase was 0.1 percentage point, but in a competitive drama run, even a small new record shows that viewers are still engaged rather than drifting away after the early episodes.
The metropolitan rating was also strong at 11.3%. Another reported measure showed a 5.9% rating among viewers aged 20 to 54. Based on those figures, the drama ranked first among all Saturday programs in the Seoul metropolitan area and in the 20-to-54 category. Episode 6 also set personal bests in both nationwide and 20-to-54 ratings.
This result builds on momentum that was already visible earlier in the series. By episode 4, Perfect Crown had crossed double-digit ratings in both nationwide and metropolitan measurements. That earlier episode also reached a peak minute rating of 13.8%. Now that episode 6 has lifted the nationwide record again, the drama’s ratings story looks less like a one-time spike and more like steady audience attention.
Romance Moves to the Center
Episode 6 gave viewers several major relationship moments between Sung Hee-joo and Grand Prince Ian. The available story details describe the two as people who share similar wounds, and the episode leaned into that emotional connection. Rather than keeping their feelings only implied, the episode showed them spending time together and becoming more openly affectionate.
The broadcast included a date outside the palace, a yacht date, and a kiss on the yacht. It also included a proposal and preparations for a contract marriage. Those points gave the episode a very clear romantic shape. If you have been watching the drama for the tension between Sung Hee-joo and Grand Prince Ian, episode 6 appears to have been designed as a turning point in how openly that bond is expressed.
The yacht kiss was one of the episode’s central talking points. It was described as their second kiss, which matters because it places the moment within an ongoing progression rather than presenting it as a single isolated scene. The relationship is developing through repeated choices, shared time, and emotional recognition.
One scene drew especially high attention. When Sung Hee-joo told Grand Prince Ian, “Do everything you want to do,” the minute-by-minute rating reportedly rose to 13.4%. That peak suggests that viewers were particularly focused on the emotional exchange between the two characters. It also fits the episode’s larger direction: two wounded people becoming more direct with each other.
Why IU Perfect Crown Episode 6 Matters
What makes episode 6 important is not only the new 11.2% nationwide rating. It is the way the episode connected ratings momentum with story momentum. The drama did not simply post a new high while standing still narratively. It moved Sung Hee-joo and Grand Prince Ian into a more intimate stage through the outside-palace date, the yacht date, the kiss, the proposal, and the contract marriage preparations.
The drama also had broader attention before episode 6. Earlier in its run, Perfect Crown had already crossed double-digit ratings by episode 4. It had also gained attention on Disney Plus, where it was reported to have ranked first among global Korean series during its early release period. That streaming performance is a separate measure from television ratings, but together they show that the drama has been drawing interest across more than one viewing space.
For fans, the appeal is easy to understand from the available facts. The drama has IU and Byeon Woo-seok at the center of a relationship shaped by shared hurt, palace-related stakes, and a romantic setup that keeps moving forward. Episode 6 offered both emotional payoff and new complications through the contract marriage preparation. That combination gives viewers something to react to immediately and something to wait for next.
The next episode is scheduled to air on May 1, 2026, at 9:40 p.m. With episode 6 setting a new ratings record and deepening the romance between Sung Hee-joo and Grand Prince Ian, IU Perfect Crown enters its next chapter with strong momentum and a clear reason for viewers to keep watching.
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