High Five ∞ Adventure

is a song by Hello, Happy World!

It is the title track for their 4th single, with Fuwa Fuwa☆Yumeiro Sandwich as the coupling track. It was released on February 20, 2019. The Blu-ray edition includes the first to ninth episodes of the mini-anime BanG Dream! Girls Band Party!☆PICO.

It is the gift song for the event Happy Adventure! ~Treasure Island Smiles~.

It was written by Oda Asuka, and arranged and composed by Kasai Yuta.

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Chart Performance

 * On February 19, 2019, High Five ∞ Adventure ranked 4th in the daily singles ranking in Oricon.
 * The single achieved 9th place in the weekly ranking.

Live Performances

 * February 22, 2019: Genesis
 * July 14, 2019: Heaven and Earth Day 2