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 2018 by 이달의 소녀, LOOΠΔ, featuring 6 tracks.
What is the most successful song from the album “[+ +]” by 이달의 소녀, LOOΠΔ?: “Stylish” is the biggest hit from the album “[+ +]” by 이달의 소녀, LOOΠΔ.

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