Hare Hare Yukai

is a song covered by Hello, Happy World!, featuring Maruyama Aya and Mitake Ran.

It was one of challenge songs in the Japanese version of the event Backstage Pass.

It was originally sung by Aya Hirano, Minori Chihara and Yuko Goto and used as the ending theme for the first season of Suzumiya Haruhi no Yuutsu.

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