In what year was the album “Stellar Into The World” released by STELLAR (K-pop)?

In what year was the album “Stellar Into The World” released by STELLAR (K-pop)?: The album “Stellar Into The World” was released in 2017 by STELLAR (K-pop), featuring 4 tracks.
What is the most successful song from the album “Stellar Into The World” by STELLAR (K-pop)?: “Archangels Of The Sephiroth” is the biggest hit from the album “Stellar Into The World” by STELLAR (K-pop).

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