As the other members of DearDream become busy with individual projects, Kanade is still searching for something he can do. He talks to the members of their senpai unit ACE about his concerns, and they tell him about a secret reference room hidden in the D-Four office building...
We were the perfect four-of-a-kind hand,
كنّا أروع توليفة رباعية فريدة
Wir waren das perfekte Quartett,
Éramos un poker perfecto
Éramos un póquer perfecto
On était chacun le nôtre
Eravamo un quartetto perfetto,
Nós éramos um quarteto 
 basicamente perfeito,