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...
My brother told me about it once.
أخبرني أخي عنها قبلاً
Mein Bruder hat mir mal davon erzählt.
Mi hermano me lo dijo una vez.
Mi hermano me lo dijo una vez.
A me ne aveva parlato mio fratello.
Meu irmão me contou 
 sobre ela uma vez.