During their debut showcase, they explained that the concept they will be showing from hereon will be a 3-part school series. When asked, "Didn't G-Friend already come out with a three-part school series?" Ain replied, "There are so many different charms you can show in school, so we decided on the school, and the three concepts we've prepared are clearly different [from one another] so we've prepared a trilogy."
When asked what sets them apart from other idols, he said, "The individualism and weapons that the seven members have are distinct. Still, we mix well together, so we believe there are many charms we can show." This is basically the answer every single rookie group gives, but best of luck to you, Top Secret!