Has it occurred to anyone that the scan might be fake? The inconsistent level of blurriness is really weird - it's like someone purposefully masked the text and certain pictures.
And just in general it looks quite fake, no?
In any case I think it's best to take the scan with a pinch of salt until a clearer version shows up.
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Some points of suspicion to think about:
-Would the developers really call a mode S4U/Stage 4 U mode? Does it even make sense? What was the naming convention used for iMAS DS? Isn't it something simpler like Performance Mode or something like that.
-Observe the screenshot on the second page that has the word "Quintet" on it. All 13 idol portraits can be seen on that screenshot... but isn't the order they're listed really weird? Why would they have Mami and Ami along with the RK members in the top row, followed by the rest (with Haruka, the supposed "main heroine" of the game being listed dead last).