``D-DAY'' Jeon So-mi and producer-turned-composer Teddy have a unique sense of synergy ``

Singer Jeon So-mi takes her first strong step as a solo artist.

Jeon will release her first solo single "BIRTHDAY" on various online music sites at 6 p.m. on 13th.

The title track "BIRTHDAY," of the single and the same name, is a dance/hip ensemble that carries the symbolic meaning of "Jeon So-mi," a newly born solo artist.

The song "Birthday" which best represents an artist named Jeon So-mi and captures all sorts of charms, was composed by Teddy, the hit-maker and chief producer of the double-track label, while Jeon So-mi also took part in a joint composition herself. Attention is focusing on the synergy between the two, who worked together for the first time through the song.

Especially, the rhythmical rap and powerful vocals will be added to the fast-tempo beat to give listeners explosive energy, and it is expected that Jeon So-mi will perform in a cheerful mood.

The song "Outta My Head," which is included in the title track, is Jeon So-mi's self-composed song and is a medium-tempo R&B track that can check out emotional vocals. The mournful lyrics and appealing vocal performances that express the confusion of love, along with the charming tone of Jun So-mi, will leave a deep impression on many people's ears.

The debut single "Birthday," which gives a glimpse of Jeon So-mi, who has become closer to a complete artist than just an idol singer, will be available from 6 p.m. on Wednesday.

Meanwhile, Jun So-mi will hold her debut showcase at 4 p.m. and start her official activities.