These two seem to be the same as Hiiragi Yutaka's earlier works, but the names were Sato and Hinako?
The shorter girl's name is now Hiyoko?
I just read Hiyorigeta and the names of the couple are Satomi and Hinako.
The next one, Soiree, are also the same characters: Sato(mi) and Hinako.
Wait... ok it's chill. On the author's extra page, they somewhat identified Hinako as Hiyoko, so I guess Satomi gets called Sato-chan, and Hinako gets called something different. I don't really get it but cool, it is the same girls ^^
That page: http://dynasty-scans.com/chapters/soiree#17