R.U.R.U.R Ru.Ru.Ru.Ru ~Kono kono Tame ni, Semete Kirei na Hoshizora wo (2007 PC)
Check for related series
Ichihiko
Kasahara Jun
R-Hinagiku
Hinami Fuuka
R-Mizubashou
Nogami Nana
R-Shirotsumegusa (D)
Aoyama Yukari
R-Kobatomugi
Kawashima Rino
R-Tanpopo
Ousaka Kai