Amane Ninomiya

Amane Ninomiya is a elementary-school sized high-school girl who stopped growing at seven years old. Amane, who is worried about her growth, comes across a weird. It is revealed that Amane and Shizuka made a promise when Amane was seven-years-old that when Amane turns sixteen, she will marry Shizuka. In the last chapter, they get married.