2018
CLC released the digital single To The Sky on February 1, 2018, as a pre-release track from their upcoming EP. The group appeared with a more mature, sophisticated look with the release of their seventh extended play, Black Dress, on February 22. After that, 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. They 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.
