Red Velvet showed off their cuteness on "Music Core".

In MBC "Show! Music Core" aired on August 9, Red Velvet performed their debut song "Happiness".

On this day, Red Velvet came out in school uniforms and showed off their cuteness. Despite the difficult dance moves, the members did not lose their smiles on stage.

Internet users who saw this commented, "I love their outfits," "Their song is addicting," and "Red Velvet is getting popular these days."