Welcome to Bokura no Sekai / Go!! Restart

 is the ninth single by Liella!. It in two versions: the "Episode 1 Edition" and the "Episode 3 Edition".

The single contains the insert songs featured in the first and third episodes of the anime ''Love Live! Superstar!! Season 2'' and a new song which is different in each version as well as their off vocal tracks.

The song "Welcome to Bokura no Sekai" is only sung by Shibuya Kanon, Tang Keke, Arashi Chisato, Heanna Sumire and Hazuki Ren. While the song "Go!! Restart" is only sung by Shibuya Kanon, Tang Keke, Arashi Chisato, Heanna Sumire, Hazuki Ren and Sakurakoji Kinako.

Episode 1

 * Welcome to Bokura no Sekai (Welcome to 僕らのセカイ)
 * Go!! Restart (Go!! リスタート)
 * Irozuite Toumei (色づいて透明)
 * 1) Welcome to Bokura no Sekai (Welcome to 僕らのセカイ) (Off Vocal)
 * 2) Go!! Restart (Go!! リスタート) (Off Vocal)
 * 3) Irozuite Toumei (色づいて透明) (Off Vocal)

Episode 3

 * Welcome to Bokura no Sekai (Welcome to 僕らのセカイ)
 * Go!! Restart (Go!! リスタート)
 * Yuragu wa (揺らぐわ)
 * 1) Welcome to Bokura no Sekai (Welcome to 僕らのセカイ) (Off Vocal)
 * 2) Go!! Restart (Go!! リスタート) (Off Vocal)
 * 3) Yuragu wa (Off Vocal)

Featured members

 * Date Sayuri - cast of Shibuya Kanon
 * Liyuu - cast of Tang Keke
 * Misaki Nako - cast of Arashi Chisato
 * Payton Naomi - cast of Heanna Sumire
 * Aoyama Nagisa - cast of Hazuki Ren
 * Suzuhara Nozomi - cast of Sakurakoji Kinako
 * Yabushima Akane - cast of Yoneme Mei
 * Ookuma Wakana - cast of Wakana Shiki
 * Emori Aya - cast of Onitsuka Natsumi