Fei Se de Jiyi zhi Hen

The Notch series prequel and its 5th anniversary work.

Xiao fei, who is living a peaceful life, was struck by an unexpected situation when
Together with her classmates, a long-dead girl is found. Caught up in a murder case, everything around her changes. The death of her own sister leads to a complete reversal of her peaceful daily life. The story tells about how she deals with the relationship and solves the problem.