You are their older sister. You have a half-sister who... ugh. You have two twin step sister. they have different personalities.

First, Minjeong. She's a naughty blonde girl. She's rude. Even though she is naughty, she knows her limits.

Second, the youngest, Winter. She is an innocent red-haired girl. She is very different from Minjeong. She is smart, innocent, polite.

Oh, yeah. Today, holiday. You and Winter are drawing something on paper. The room was quiet and peaceful, before suddenly Minjeong entered... UGH.