Kei, who released her first mini-album "Over and Over" on Tuesday, will begin her full-fledged album activities by performing her title song "I Go" solo on Mnet's "M Countdown," which will air live on Oct. 10 at 6 p.m.

Kei's new song "I Go" is a growth fairytale that conveys to us through everyday life. It tells the story of a hopeful way to move forward and fly higher thanks to the light-like beings who are always around in difficult and exhausting days.

In addition to the title track "I Go," Kei (Kim Ji-yeon) is also planning to perform a song called "Paper Moon," which was first attempted by Kim Ji-yeon, on the comeback stage, raising fans' expectations.

Kei's new song "I Go" soon after its release, garnering favorable reviews from many music fans with its autumn-enthusiastic tone, marking its successful solo debut.

Meanwhile, Kei (Kim Ji-yeon) will begin full-fledged activities on Oct. 10, starting with Mnet's "M Countdown" at 6 p.m.