The title is a Korean term used by children referring to bloodbrothers sharing everything together.
The episode won 2 Emmy Awards for Outstanding Guest Actress in a Drama Series - Lee Yoo-mi for playing Ji-yeong and Outstanding Production Design for a Narrative Contemporary Program (One Hour or More).
The actor Anupam Tripathi, who portrayed Ali Abdul(Player 199), the Pakistani character in the show is an Indian based in South Korea in real life.