Girl group GFriend held a showcase for its new full-length album "Walpurgis Night" on Monday at the SBS Prism Tower in Mapo District, western Seoul.

At the showcase, GFriend introduced the concept of its new album as well as performing the lead track, "Mago" for the first time.

"Walpurgis Night" comes as the last part of its new series of albums that began earlier this year in February with "Labyrinth" and was followed by "Song of the Sirens" in July.

For the lead track "Mago," members Eunha, Yuju and Umji took part in writing the song, completing the disco song with retro synthesizers and an upbeat melody line.

GFriend's new full-length album "Walpurgis Night" drops at 6 p.m., Monday worldwide.

BY JEON TAE-GYU [jeon.taegyu@joongang.co.kr]