Zenryouku Shounen

is a song covered by Hello, Happy World!

It was originally sung by Sukima Switch and used as one of the songs the rhythm game Moero! Nekketsu Rhythm Damashii Osu! Tatakae! Ouendan 2. It was later used as the first ending for the anime All Out!! and second ending for the OVA Tokyo Marble Chocolate. It was also used as an theme song for the commercial of Pocari Sweat in Indonesia.

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