It is scheduled to start streaming on Nico Nico and two Chinese streaming services simultaneously this summer.
The official YouTube channel of the upcoming live animation Heart x Algorhythm has posted a three-minute clip to introduce the behind-the-scenes of the Japanese-Chinese co-production project.
The two main virtual idols, native Japanese speaker Kirin (CV: Minori Suzuki) and Chinese speaker Sai (CV: Emiri Iwai/Singing Voice: Xiao Wu), are designed by KEI, best known as the original package illustrator of Hatsune Miku.