In what year was the album “20” released by Leo Ieiri?

In what year was the album “20” released by Leo Ieiri?: The album “20” was released in 2015 by Leo Ieiri, featuring 3 tracks.
What is the most successful song from the album “20” by Leo Ieiri?: “Junjou” is the biggest hit from the album “20” by Leo Ieiri.

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