Upcoming anime Natsuiro Kiseki is noteworthy in that it'll be directed by Seiji Mizushima (Un-Go, Gundam 00, Fullmetal Alchemist); its principal characters will be voiced by J-pop/voice actress quartet Sphere (Aki Toyosaki, Ayahi Takagaki, Haruka Tomatsu, Minako Kotobuki); and it's an original—not based on novels, manga or games.

Tatsuhiko Urahata (Monster) will be writing the series, while Yuichi Tanaka (A Certain Scientific Railgun/Magical Index) adapts Hidari's (Fractale) character design.

In the months since its announcement, there was only one preview image of the upcoming Sunrise production.

Last week, there was a second, and now there's a third:

More details about the series will be announced at a press event to take place on the 29th.

via 0takomu