the song is pretty good!
TONAi BOUSHO means "Somewhere in Tokyo" and they are WACK's new girl group!
they are probably the least WACK-like WACK group ever but they seem fun
more info
"TONAi BOUSHO" unveiled, new girl group under WACK! - K-Pop Source — Keeping the K-Pop Forum Spirit Alive
TONAi BOUSHO (都内某所; Somewhere in Tokyo) is a new 3 member girl group under WACK and Avex, they are going to be produced by Kuro Chan and they are the rival group of MAMESHiBA NO TAiGUN the members are Miki (yellow) Mina (red) Richi (blue) they just released their first single "Cookie"
kpopsource.com