Now about Ido e Itaru Mori e Itaru Ido (More well know as Ido Ido) this are my memories:

Ido Ido was released on June 16, 2010, with 2 editions [Regular Edition] and [First Press Limited Edition].
The difference from this editions were the different cover arts, in which RE had Märchen von Friedhof with Elise doll and the LE young März with young Elizabeth von Wettin.


Also LE came with a DVD with:

  • 『光と闇の童話』 Music Clip (Hikari to Yami no Douwa) 
  • イドへ至る森へ至るイド 【5.1ch Surround Audio Mix】(The songs of the Disk on  5.1 surround sound)


Hidden tracks:

RE had "テレーゼ、もしくはエリーゼの為に…"(For Therese, or perhaps for Elise...)
LE had "黒き死の行進" (The Progression of the Black Death)


Extra notes:

Originally when they announced (on the web) the singers/characters, there was listed Idolfried Ehrenberg who later was "corrected" as Märchen von Friedhof instead.



Benefits

The LE was sold with limited goods for the first buyers. This goods were different Postcards illustrated by Yokoyan, for each chain store.


From Animate

【七へ至るイドの肖像】- The portrait of Ido that leads to Seven 






From Gamers

【汚れなき少女の肖像】- Portrait of the Pure Girl





From HMV

【少年と少女の肖像】- Portrait of the Boy and Girl





From 新星堂 (Shinseido) 

【人形だった少女の肖像】- Portrait of the Girl that was a Doll





From ソフマップ  (Sofmap CD shop)

【白き乙女の肖像】- Portrait of the white maiden





From Tower Records

【…へ誘うイドの肖像】- Portrait of Ido that lures one into...





From マグマニ(MAG*mani)

【過ぎ去りし母子の肖像】- Portrait of the deceased mother and child





From Melon Books

【黒き貴婦人の肖像】- Portrait of the Dark Lady





From TSUTAYA RECORDS

【少年とイドの肖像】- Portrait of the boy and Ido





From others stores

【肖像と闇の部屋】- Room of portraits and darkness