What makes Himitsu by Yui Horie notable?

'Himitsu' received critical acclaim for its catchy compositions and lyrical depth, solidifying Horie’s standing within the J-pop genre. It also charted well in Japan, further demonstrating her crossover appeal beyond anime soundtracks and contributing to the growing popularity of voice actors in the mainstream music industry. Released on January 1, 2012, 'Himitsu' marks Yui Horie's return to the music scene after a successful stint as a voice actress in anime. At this point in her career, she was expanding her musical repertoire, showcasing her evolution from primarily an anime song performer to a more established pop artist.