Conversation so far:
what is Koko ni ita koko?
On February 21 AKB48 announced its third album, Koko ni Ita Koto (kokoniitakoto), which would include 11 new tracks and was scheduled for an April 6 release.

Question: what is a single from the album?
Self-contained rewrite: What is a single from the album Koko ni Ita Koto by AKB48?