Akira Ishibashi is Ema's childhood best friend, her parents being friends with her dad. Their friendship was cut short when she had to move to America along with her dad for his work. They are later reunited three years later when they move back to Japan, only for her dad to have to move again. Out of pity for Akira, Miwa invites her to live in the condo with the rest of the Asashinas. Not wanting to have to uproot her life again, Akira decides to stay with the absurd amount of brothers and her best friend, just how bad could it be?