Idol No Naisho Goto!

Every idol has a secret, even a certain idol group that goes by the name "Twinkle" is no exception. There are three members in the group. Serika, who is the leader of the group, Yuzuki, who is timid and pure, and Hinata, who has a tomboyish personality. Even though they have different characteristics, they share the same secret... This is the story about a certain idol group that aims to become a top idol while hiding their secrets.