The K-pop landscape shifted significantly in early 2026 with the official solo debut of Heeseung, who now promotes under the stage name EVAN.
While Heeseung remains a pivotal figure in the industry, his transition into solo activities necessitated a major redistribution of lines and vocal responsibilities within ENHYPEN.
On May 1, 2026, the group kicked off their highly anticipated “BLOOD SAGA” world tour in Seoul, showcasing their first live performances as a six-member unit for certain segments.
However, the tour’s opening night sparked a heated debate online centered around the group’s fan-favorite track, “Moonstruck.”
Originally characterized by Heeseung’s signature soaring high notes, the live version of “Moonstruck” now features Sunoo taking over these challenging vocal sections.
Almost immediately after the concert, snippets of Sunoo’s performance began circulating on social media, leading to a wave of criticism from some netizens regarding his vocal stability and technique.
The discourse has placed Sunoo at the center of a “high note controversy,” highlighting the immense pressure on idols to fill the shoes of their most prominent vocalists during transitions.
The “Moonstruck” High Note Debate
The core of the criticism stems from a specific climax in “Moonstruck” where Heeseung’s original studio version set an incredibly high bar for vocal precision.
During the “BLOOD SAGA” Seoul dates (May 1–3, 2026), Sunoo took on this part live. Some audience members and online observers pointed out that Sunoo seemed to struggle with the pitch, with some calling the performance “shaky” or “off-key.”
On various community forums, critics argued that the redistribution of lines should have been handled more carefully, with one user stating,
“Sunoo has a beautiful tone, but pushing him into Heeseung’s power-vocal range without enough preparation was a mistake by the agency.”
The backlash intensified as comparison videos between the original 2025 performances and the new 2026 tour version went viral.
Detractors claimed that the absence of Heeseung’s vocal anchor was palpable, leading to a broader discussion about whether the group could maintain its “performance power” as a modified unit.
Some went as far as to criticize the group’s overall live standards, using this specific moment as a lightning rod for broader complaints about fourth-generation vocal training.
Fans Rally in Defense of Sunoo’s Courage
In the face of rising negativity, the ENHYPEN fandom, ENGENE, has launched a massive counter-campaign to support Sunoo.
Supporters argue that the criticism is unfairly harsh, especially considering the short timeframe the members had to restructure their entire discography for the tour.
Fans have pointed out that Sunoo has historically had fewer lines and is now stepping up to fill a massive void. One viral post on X (formerly Twitter) defended the idol, saying,
“People are so quick to judge a few seconds of a three-day concert. Sunoo had the courage to take on a part everyone knows is difficult, and he did it while doing heavy choreography.”
The debate has also touched on the internal dynamics of the fandom. During the Seoul concerts, some fans noted a divide in the crowd, with reports of “OT6 fanchants” surfacing, which caused further distress among those who support all seven original members despite Heeseung’s new solo path as EVAN.
Jay even addressed the general atmosphere during a recent birthday live, urging fans to be respectful of the members’ hard work and decisions.
Despite the vocal “Moonstruck” controversy, the “BLOOD SAGA” tour remains a commercial juggernaut, proving that while vocal transitions can be rocky, the bond between the members and their fans remains a potent force in the industry.
