Isumi Saginomiya and Sakuya Aizawa are Nagi Sanzenin's childhood friends. All three young ladies were born into wealthy families and grew up together, but they all envy something about each other. Episode 
4 illustrates the irreplaceable days of interaction and horseplay between these Cutie Mates. The world 
is full of all kinds of new meetings...
But if you can't understand 
something as simple as that,
Pero si no puedes comprender 
algo tan simple como eso,
Mas se você não conseguir 
entender algo simples como isso,