Apink Jung Eun-ji, who is returning as a "solo singer," has begun a full-fledged comeback countdown.

The agency PlayM Entertainment posted a scheduler image of Jung Eun-ji's fourth mini-album "Simple" through Apink's official SNS and fan cafe at midnight on July 3, drawing attention.

The name of Jung Eun-ji's new album turned out to be "Simple." The latest new book, "Simple," means "simple is the most beautiful."

Jung Eun-ji will release a mini album in a year and nine months after her third mini album "Hyehwa" on July 15, and a new song in a year and three months after her digital single "Be With Me," a surprise duet with Kwon Jung-yeol, 10cm.