Sergio Reis is the brains behind the elegant dance routine for BTS track Black Swan (Picture: Getty/Instagram)

Choreographer Sergio Reis wanted to ‘challenge’ BTS with his unique dance routine for Black Swan.

Before officially coming back with title track ON, the K-pop group released Black Swan from their new album Map Of The Soul: 7.

In the first ever performance of the song, they went barefoot on stage for the routine that was both typically polished, but also a little different from the bouncy, energetic dances we’ve seen from them in the past.

The moves are down to Brazilian-born Sergio, who wanted to push the group to pull off the moves alll while delivering flawless vocals.

Asked by Metro.co.uk if he thought about whether BTS could sing and do his dance, he said: ‘Sometimes yes. Sometimes I’m gonna just challenge them and see whatever they are able to do.

‘I’ve seen their work before and I’ve seen that they are crazy dancers. They are able to freakin’ go full out and dance and sing at the same time.

‘So I was like I’m not gonna really hold back, I’m just gonna think about what are the most special moments within the performance and what are the most hardest parts for them to sing, so I can have that in the back of my head. But just challenge them.’

Sergio, 24, teaches dance classes in the Netherlands where he lives, and has his own dance crew called CDK. His feels BTS’ agency Big Hit Entertainment got in touch with him after watching one of their performances that had a similar ‘dark’ feel to Black Swan. Which might be why it was so easy for him to be ‘inspired’ by the track.

‘They were really telling a story within the song and they were very specific about the vibe and what they wanted to translate within the song,’ he explained.

‘I thought that was a really good thing to hold on to and use as inspiration.’

Like the rest of us, he tuned in to watch them do their thing on The Late Late Show for the very first time, and he thinks they were all ‘amazing’.

‘They all stood out. As the creator I feel like the choreography is created for a group. It’s not choreography that you do by yourself. They fill each other up.

‘You create it within a few months and then you kind of forget about it so I had zero expectations, and the moment I saw it I was like, “Oh my god they’re doing my choreography, they’re doing my moves on that huge platform” and I was just like, “Jesus this is big”. I was pretty much in shock.’

Sergio’s work – which is set to continue with future Big Hit collaborations – has earned him heaps of praise from Brazilian ARMY and he’s become a bit of a home town hero.

He told us: ‘I did not expect any attention. For me it was like, “okay I’m gonna do this job and it’s gonna go online and no one is ever gonna find out I created it.”

‘When I posted this video online one of the fans they came and asked me, “Are you from Brazil? There are some rumours saying you’re Brazilian”. I was like “Yeah” and then like 30 minutes later I looked at my phone and there were all these Brazilian fans. There were so many, they were so proud.’

As well as continuing to run his studio, Sergio – who has been dancing since the age of 13, has upcoming projects in various countries, and often makes routines for TV shows, competitions and other artists.

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And he is loving the attention BTS is bringing to dance through their popularity.

‘A lot of artists like dance but they don’t really make it as a big deal as BTS make. I’m really a huge fan of what they’re doing and their work ethic.’

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