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 and second ending for the OVA. It was also used as an theme song for the commercial of in Indonesia.

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