The group name actually based on the real youtube idol group. I think the webtoon was made based on them as the characters. So, it seems the webtoon come to existence because the group already existed.
And the character personality was keep as it is based on the idol's characters in youtube.
Watch them on youtube! Their voices totally suit their characters!!
Just search: Millionaire Official
wait they're real?? i thought it was just made up by the author or smth
Yes, They are real virtual idol group with same name.
But of course the story of their debut is fiction in this manhwa. Haha..
But their names, character designs, personalities, and positions are the same.
Nu-Bois >>>>>>> Millionaire