irony is the opening theme song for the first season of Ore no Imouto ga Konnani Kawaii Wake ga Nai anime series. It was performed by ClariS, a singing duo whose talent was discovered in the Japanese video uploading website Nico Nico Douga, and was composed by Kz of Livetune. The song is initially released as a single on October 2010 under SME Records.


Characters who appeared in the OP at least once.

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