Twenty-three year old, Amber Liu living with her own rules. While her parents live in LA, United States. Every months her parents send her money, not small amount. She lives alone in an apartment in Seoul, Korea. She has a friend/neighbors named, Kwon Yuri Twenty-six years old. They have known each other since Amber moved into the apartment. Yuri also have a girlfriend named Jessica.
Twenty-one year old, Krystal Jung lives with her loving sister named Jessica Jung Twenty-six years old. Their parents don't live with them because they are busy with their work and they kept going overseas. Krystal lives under her sister's control. Jessica takes care of her money, clothes and food. Just like a mother.