为了姐姐我成了女团偶像 (Associated Names)

"Ah, you mean Miyamoto-san, of course he's the world's number one idol! " "That's right, we will always follow behind Nana-chan! " "Miyamoto Nana is so awesome! " This is what fans are talking about. "Why? Why do my cheeks turn red and my heart beat faster when I'm facing Nana-chan? This isn't love, is…