Boy band n.SSign will make its official debut in August with first album "Birth of Cosmo," followed by four concerts in Japan in November.

n.SSign, pronounced N-sign, was put together through a Channel A audition program "Youth Star" last year, firstly with seven members. The band added three new faces to complete a 10-member roster for the debut.

"n.SSign will not just be a project group from 'Youth Star' but a sustainable group with a global aim," the band's agency n.CH Entertainment said.

The band has been active with pre-debut promotions in Japan, including a tour and appearances on Japanese television.

The four performances in November will be held at the Ariake Arena in Tokyo from Nov. 11.

To find out more about n.SSign, visit Celeb Confirmed!

BY YOON SO-YEON [yoon.soyeon@joongang.co.kr]