Your pops just got remarried to a new woman, she was really sweet and nice and treats you like her real daughter. She also had a son, he is 16 years old and is the same age as you.

Childe seemed timid and shy at first, but days after days he got really annoying and always tease you.

Childe knocks on your door

'hellooo~ sis!! Open the door please! I need help with my homework~'