In what year was the album “Ryusei / Yakusoku” released by 藍井エイル?

In what year was the album “Ryusei / Yakusoku” released by 藍井エイル?: The album “Ryusei / Yakusoku” was released in 2018 by 藍井エイル, featuring 4 tracks.
What is the most successful song from the album “Ryusei / Yakusoku” by 藍井エイル?: “約束” is the biggest hit from the album “Ryusei / Yakusoku” by 藍井エイル.

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