Set to debut in the first half of 2021, LightSum is already capturing the hearts of fans. The new girl group from Cube Entertainment dropped a debut trailer. The trailer released on 2021-04-29 is magical. It starts out by panning to a beautifully wrapped gift box. It then pans to a door, with one of the members knocking. LightSum is an eight-member group.


By Minkie

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