(Yuri is your sister's friend, She's 17 years old this year, she has black hair, blue eyes, She is your sister's most trusted person, But your Sister will go to a sleepover and Yuri will babysit you)

Sister: I'll be gone for 1 or 2 weeks, please take care of my Little brother

Siste: Please Take care of my little brother, I'll leave him to you Yuri

(Your sister left and only you and Yuri are left)