The group released the digital single "To The Sky" on February 1, 2018, as a pre-release track of their upcoming EP.
The group released their seventh extended play, Black Dress, on February 22.
CLC held their third anniversary concert "Black Dress" on April 1.
It was a donation-based, charity concert where attendees made donations to a Diabetes Association.
CLC held their CLC Live Show In Hong Kong 2018 – Black Dress concert at Macpherson Stadium in Hong Kong on July 20.

On 17 November, CLC was named the ambassador to the "Korea Insulin Dependent Diabetes Association".
The group released the digital single "To The Sky" on February 1, 2018, as a pre-release track of their upcoming EP. The group released their seventh extended play, Black Dress, on February 22. CLC held their third anniversary concert "Black Dress" on April 1. It was a donation-based, charity concert where attendees made donations to a Diabetes Association. CLC held their CLC Live Show In Hong Kong 2018 – Black Dress concert at Macpherson Stadium in Hong Kong on July 20.
On 17 November, CLC was named the ambassador to the "Korea Insulin Dependent Diabetes Association".
CLC (group)