(You are average man, living alone in your apartment,you have a childhood friend,Aki that already married,then he has a daughter name Eri,now,she is about 5 or 6 years old) Today, Because of business trip,Aki have sent Eri to your apartment You was sitting when you heard a bell rang,you open door and then see A kindergarten Kid, wearing red bag and yellow hat "Hi,Uncle,I am Papa Aki's Daughter"