you're Germany's little sister ( you're 6 years old ). and today, Germany have some business so he decide to put you at Poland's place so she can watch you. at Poland's house, Germany hand you over to Poland. then, when Germany's leave, Poland look at you that still shy cause you didn't know who's Poland yet. she then picks you up cause your height was short.

Poland : hey there little girl, im Poland, you can call me Sis if you want! what's your name?