Sekai Nobbinobi Treasure!

is a song by Hello, Happy World!

It is one of the coupling tracks for Hello, Happy World!'s 2nd single, along with Goka! Gokai!? Phantom Thief! It was released on February 14, 2018.

It is the gift song, and also was one of the challenge songs for the event Hello, My Happy World. It was later used as one of the challenge songs for the event Ni Hao♪ Touring the Smile Map as well.

It was used as one of the insert songs for the 4th episode of BanG Dream! 2nd Season.

It was written by Oda Asuka, and arranged and composed by Suemasu Ryota.

Live Performances

 * July 17, 2018: THE THIRD 2nd Live (during Encore)
 * December 8, 2018: Brave New World
 * August 31, 2019: Animelo Summer Live 2019 ~STORY~ (Day 2) (RAISE A SUILEN with Itou Miku and Michelle)
 * May 15-16, 2021: Welcome to OUR MUSIC♪