Yuan zhi Ge - Singing Iris

The world was destroyed by mysterious entities called “Minions”. Most of the human beings died either killed by the “Minions” or the “Snowflake Infection” caused by them. One day, Jiu Jiu, the only survivor in the city of Jiangzhong, meets Lin Nan, a genius scientist from the survivor camp outside the city, and that marks the beginning of the story.

From Steam