In what year was the album “[&]” released by 이달의 소녀, LOOΠΔ?

In what year was the album “[&]” released by 이달의 소녀, LOOΠΔ?: The album “[&]” was released in 2021 by 이달의 소녀, LOOΠΔ, featuring 7 tracks.
What is the most successful song from the album “[&]” by 이달의 소녀, LOOΠΔ?: “U R” is the biggest hit from the album “[&]” by 이달의 소녀, LOOΠΔ.

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