六日之失 (Liù Rì zhī Shī)

Background
"Liù Rì zhī Shī" is an original song featuring Luo Tianyi that was originally uploaded on December 28, 2015. It was later deleted and replaced with a 2017 upload known as the "Melody version".

Both versions exceeded 100,000 views on bilibili.

Unofficial
Unofficial