Another up and coming girl group to debut this year! Loona has introduced another member, YeoJin, their fourth member.

Loona has released a teaser image for YeoJin. She looks sweet with her porcelain skin, natural blush, and always refreshing mono lids as she stares into the camera innocently. BlockBerry Creative has not yet released a song or even a music video teaser for her.

According to Allkpop the upcoming girl group from BlockBerry Creative (a subsidiary of Polaris Entertainment) will be unveiling a new member of the 12-member group every month.

In October, they released their first ever member, Heejin. In November, they released Hyunjin, the second member. Last month, BlockBerry Creative has introduced Haseul. All the three members have showcased their singing talents through songs and music videos.

The first three members released a Christmas song "The Carol" last month. Hyunjin and Heejin released a duet "I'll Be There" while Hyunjin released "Around You". Heejin has also released the song "Vivid" in October. She has also released a dance practice of it.

Meanwhile, Haseul has released "Let Me In," which was filmed in Iceland, last month. Before htat, Loona has release two type of image teaser for her. The first one was her with short, ice blonde hair; the other one was her with long brown hair.

BlockBerry Creative will release eight more girls this year and then Loona I set to debut in October, this year too.

International fans find it very fascinating how a small company can introduce a girl group like this. The way they introduce each member is really grand. Other just introduces them through an image teaser and some short video clip but Loona is being introduced with their own songs.

This is the first time that a girl group is being introduced like this. All of the revealed members' profiles are in Loona's official website. Check them out!