Korean acapella "band". They're fun, and also very talented.
Van Canto was my first touch with acapella like this, then Spiralmouth from the Crash Twinsanity OST. It's neat!
#tunestr https://open.spotify.com/intl-de/track/16EOYsczCyVbIhbZhXcYli?si=b5bf2ac902df44c9