NiziU, a girl group from JYP Entertainment will finally make their Korean debut on Monday, October 30.

Earlier today, JYP Entertainment released a teaser of NiziU's 'HEARTRIS' music video. Stray Kids' Felix made a surprising appearance in the teaser which means that the boy group member will also appear in the full music video.

It's worth mentioning that in the past, NiziU members made an appearance in Stray Kids 'Back Door' music video.