Hare Hare Yukai

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

It was one of challenge songs for the Japanese server's run of the event Backstage Pass.

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

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