For their first European tour, LE SSERAFIM arrived in London with something to prove — and little interest in easing into it. Taking over the O2 Arena on 16 October as part of their 2026 LE SSERAFIM TOUR ‘PUREFLOW’, the five-piece delivered a performance that balanced explosive choreography and unapologetic confidence with moments of genuine affection, reaffirming the qualities that have made them one of K-pop’s most compelling girl groups.

A fast-paced techno beat takes over, encouraging the audience to clap, jump and bounce as real-time crowd shots appear between flashes of rainbow lighting and lasers. “For we are not fearless, and therefore powerful, PUREFLOW runs through us,” declares the introduction. As the music reaches its climax, five silhouettes rise from the floor, ushered in by the words “Time to celebrate.”

There is no better introduction to the evening’s atmosphere than “CELEBRATION”, the lead single from PUREFLOW pt. 1. Its placement immediately establishes the tone: this is a show built on momentum, collective energy and the freedom to let go. “Creatures” follows before “Eve, Psyche & the Bluebeard’s wife” brings one of the group’s most recognisable tracks into the mix, giving the audience little time to catch their breath.

Yet what lies beneath the cathartic energy is an awareness of what the occasion means. The members speak earnestly about the significance of selling out one of Europe’s largest arenas, acknowledging that this is their first time bringing a tour to the continent. For FEARNOTS, the wait has been a long one. The scale of the venue makes the achievement tangible, but the group’s appreciation for those who have helped them reach this point gives the moment its emotional weight.

That sincerity becomes more apparent when HUH YUNJIN introduces “Need Your Company”. Sharing the story behind writing the song, she reflects on how the members have become “not only teammates but friends and sisters”. The acoustic ballad provides a welcome change of pace after the relentless opening, revealing a softer dimension to a catalogue often associated with its bold, self-assured attitude. It is a reminder that the group's strength lies not only in projecting fearlessness, but also in the relationships that make that confidence feel personal.

The mood soon shifts back towards the dancefloor. A run of tracks including “HOT”, “Perfect Night”, “Blue Flame” and “EASY” benefits from live-band arrangements that lend familiar songs a renewed sense of immediacy. The added instrumentation gives the performances a different texture, creating a distinction between the concert experience and the recordings fans already know. Across these numbers, LE SSERAFIM embodies the sassy, cool-girl energy that has become central to their identity: confident, empowering, and unafraid to have fun.

The talking segments are equally important in making the arena feel less imposing. “I heard you guys are one of the best crowds to play with,” YUNJIN tells the audience, before reminding everyone that it is Friday. HONG EUNCHAE adds her new favourite saying, “Thank God It’s Friday,” capturing the playful familiarity that runs through the group’s interactions. KIM CHAEWON and KAZUHA subsequently take charge, striking charming poses for the cameras and inviting selected audience members to dance with them.

Then comes “Saki”, complete with a surprise entrance from SAKURA through the crowd. Sporting Sherlock Holmes accessories, she playfully places them on a concertgoer, turning the performance into another opportunity for spontaneous interaction. The choreography’s cheeky twerking moment towards the end predictably prompts one of the loudest cheers of the night. It is a playful interlude that allows the members’ personalities to shine without sacrificing the production’s momentum.

Following a second video interlude, the set returns to full force. “BOOMPALA” leads into “ANTIFRAGILE”, where KAZUHA’s perfectly executed gymnast leg stretch earns its own moment of appreciation, before “CRAZY” and “SPAGHETTI” keep the energy firmly in the red. The crowd enthusiastically joins in with “CRAZY”’s iconic “all the girls are girling, girling” and the song’s repeated “da-da-da” while “SPAGHETTI” proves a particular highlight, its extended central dance break giving the group room to showcase the precision and physicality underpinning their performance.

What is most striking by this part, however, is how little the energy has diminished since those opening silhouettes rose from the stage. Even as the set moves between different sounds, moods and opportunities for audience participation, the evening maintains a consistent sense of purpose. PUREFLOW is at its best when LE SSERAFIM brings all these elements together: the spectacle, the attitude, the musicianship and, beneath it all, the bond between five performers and the FEARNOTS who have waited to see them here.

Ultimately, LE SSERAFIM’s first London show felt like more than a long-awaited European debut. It was a confident statement of who they are as performers: technically precise, instinctively charismatic and increasingly comfortable balancing the larger-than-life stagecraft of K-pop with the personal connections that make it resonate. If PUREFLOW is about finding strength in movement and solidarity, then the O2 Arena offered a fitting demonstration of that philosophy in action. For a group making their first touring appearance on this side of the world, they left little doubt that FEARNOTS would be ready to welcome them back.