이수만
The EP was produced by Lee Soo-man, who is also the main producer for the group. The title for the EP is a Korean term used to address to a royal person, similar to the attributes "your highness" or "your majesty" in English. The title single "Mama" is written by Yoo Young-jin, who also co-wrote two other singles from the EP, "What Is Love" and "History".