There Is an Idol Sister Next Door

I was just going out to Sister 3's shop, how could I end up being chased? I swear, next time I take a martial arts class, I won't doze off! Fortunately, this GG who must be older than her saved her, and he also lives next door to the home she bought herself~~~~~~~~ What? This GG, no! It turns out that this is DD, and he is younger than her! !