- Fan Nickname
- Names the Same: Sehun was teased by classmates when he was younger for having the same name as the mayor of Seoul. After this, he decided to become president of South Korea to have a higher rank than the mayor.
- Promoted Fanboy - Lu Han. In high school, his music folder was full of TVXQ, H.O.T, Super Junior, and Girls' Generation's music, especially a fanboy of TVXQ (mainly Yunho). He would even sneak out of class to watch their music videos.
- Baekhyun was a huge Sone (Girls' Generation fanboy). He managed to become Taeyeon's boyfriend.
- Xiumin has been a TVXQ fan since he was in high school, said TVXQ were his inspiration to be an idol and are like gods to him, and said it was his dream to perform with them. Now he has a stage with Changmin where he has to wear a fish mask.
- Scully Box - Their shortest member is D.O, thus he's made to use one often.
- What Could Have Been
- They were unofficially known as M1 and M2 and "Land of Boys" before their debut. The group also went through several line-up changes.
- Other trainees who were considered to be a part of the group are shown here. The only trainees shown who made the cut are Kim Jong-in, Kim Jun-myun, and Park Chanyeol.