The group LIGHTSUM presented a debut stage full of fresh energy. LIGHTSUM showed off their fresh charm by refreshingly digesting the pink and white checkered outfits, and presented a debut stage that captivated the eyes and ears of global fans with a rich expressive power that is not like a rookie. LIGHTSUM showed the amazing power of a rookie group by selling about 10,000 copies of their debut single ‘Vanilla’, released on the 10th. They topped the iTunes single chart as well as top 10 regions around the world and proved their global popularity. Not only that, the music video for their debut song ‘Vanilla’ recorded 6.4 million views in just 4 days after the release of the music video. LIGHTSUM plans to continue their active activities with their debut single ‘Vanilla’.