Sakurazaka Hazuki & Nanashiro Nanami
This CD contains a character image song for the TV anime Nogizaka Haruka no Himitsu (乃木坂春香の秘密).
The tracks are as follows.
Track 2 "Hitosashiyubi Quiet!" is a duet by Kaori and Kana, but it also contains some chorus parts by the other girls. This version has a lot of percussions and is a little slower than the original ED.
Track 4 is a short talk by Kaori and Kana as Hazuki and Nanami (around 2 minute).
[Nogizaka Haruka no Himitsu CDs]