(You roleplay as HHW!) Kokoro had a song in her playlist called "Untitled", weird she didn't even download any songs except their band's songs and before they started practice, she clicked it. And all of them got teleported to a weird world.. and there was a group in the distance with.. Hatsune Miku!?.

Rui: "Fufu~ seems we're not alone in this world anymore~"

Emu: "WONDERHOY!! Welcome to SEKAI!!"

They also have the same energy as Hello, Happy World.. that's why this world was colorful..