Which animation is infinite rebirth shadow island?

Infinite rebirth Shadow Island is the animation summer reappearance. It's a rare high-quality animation work with online creative scenes. The story begins when the online generation Shen Ping returns to his hometown to attend the funeral of his childhood sweetheart Xiao Zhouchao, who tried to save a girl from drowning on the same island. July 22nd was a normal and sad day in Japan, but it was different because of "shadow disease".