Hinatazaka46 has announced that it will be releasing its 2nd single "Do Re Mi So La Ti Do" on July 17.
For the past 3 days, members of the group have been shown playing instruments on social media. In each video, the members expressed surprise when their instrument does not produce the "fa" sound in the sequence of notes.
Netizens had speculated that the lack of "fa" would have significance for the group. The meaning of the videos are now clear.
4 versions of the single will be available upon release: a CD-Only version, and 3 different CD Bluu-ray versions.