Full version???
They only have webtoon as long as I know, and the current chapter is up-to-date.
The webtoon was made by inspiration the author get from a real youtube idol group. (I bet the author was their fan, and decided to make homage for the group, but somehow the webtoon got popular).
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
Oh sorry I didn't really paid attention but, thank you for the suggestion I will make sure to read it later! :)
Where can I read the full version?