Year book #1

MV: Yearbook #1 (30.1.2018)

Related Videos:
Behind the Scenes #1, #2 and #3 (3, 5 and 6 February 2018 respectively)

Members: Taeyong, Doyoung, Ten, Renjun, Johnny, Mark, Jeno, Jaemin, Haechan, Jaehyun, Winwin, Yuta, Jisung, Chenle, Taeil, and the three new members: Jungwoo, Lucas and Kun.

Comments:
The three new members also released handwritten letters on Instagram, with the tags #SMROOKIES and their respective names, but also the hashtag #Lucky3People, representing the three of them about to make their debut. You can read their letters over on this link : https://twitter.com/smrookies.
I also saw someone over on Twitter say that the first part of Interlude Regular to Irregular is NCT 2018 Yearbook #1.
Many people also saw the similaries between this concept and the Images for the Theme of the OFFICIAL BOOK of NCTzen 127-JAPAN. (Link:https://twitter.com/NCT_OFFICIAL_JP/status/1541708129154777088)

#NCT2018 New Melon Profiles - https://www.facebook.com/media/set/?set=a.1876744199016570&type=3