Explanation of the origin of the name Y・M

On the right is an illustration of a man (He has long, straight hair that's half purple and half navy blue, a single strand of bangs hanging between his eyes, yellow eyes, a navy blue suit, and a red tie. ) with text on its left. At the top, it says the Japanese kanji "夢" (yume). Below that is a downward-pointing arrow, and further below that is the word "yume". Below that, there is another downward-pointing arrow, and below "Y・M" is written.