New rookie girl group, LIGHTSUM, became the most recent addition to Mnet's series of 'relay dance' videos on June 21st.

Here, we can see the girls dance to their debut song, 'Vanilla', with altered choreography to fit the relay-style format. The girls are wearing plaid-themed outfits, and are clearly having fun as they dance to the music.

Please check out the relay dance video, and let us know what you think!