Niki-chan Wonderland (にきちゃんわんだーらんど; 2nd Generation Wonderland) is a song by Up Up Girls (2). It was digitally released together with its instrumental on July 15, 2021 through various websites.
- Niki-chan Wonderland
- Niki-chan Wonderland (Instrumental)
- "Niki-chan Wonderland" is the second song composed by member Kajishima Aya after "Donomichi Happy!". This is also the first song to feature rap lyrics written by member Morinaga Niina.
- The jacket cover image imagines the members jumping out of the toy box referenced in the lyrics, and marching toward a bright future with rich individuality.