List of Nogizaka Haruka no Himitsu episodes

The Nogizaka Haruka no Himitsu animated television series is based on the light novel series of the same name written by Yūsaku Igarashi and illustrated by Shaa. The episodes, produced by Studio Barcelona, are directed by Munenori Nawa, written by Tsuyoshi Tamai, and features character design by Satoshi Ishino who based the designs on Shaa's original concept. A pre-broadcast aired on July 3, 2008 and twelve episodes were produced which aired in Japan between July 10 and September 25, 2008 on Chiba TV and TV Kanagawa. Six DVD compilation volumes were released by Geneon Entertainment between September 26, 2008 and February 27, 2009. A Blu-ray disc box set of the series was released in Japan on September 26, 2009.

A second anime series entitled Nogizaka Haruka no Himitsu: Purezza (乃木坂春香の秘密 ぴゅあれっつぁ♪) was directed by Munenori Nawa and produced by Studio Barcelona under the name Diomedea. The second season began airing in Japan on October 6, 2009 and contains twelve episodes.

Two pieces of theme music are used for the episodes of both seasons; one opening theme and one ending theme each. The first season's opening theme is "Tomadoi Bitter Tune" (とまどいビターチューン) by Milan Himemiya and Chocolate Rockers. The ending theme is "Hitosashiyubi Quiet!" (ひとさしゆびクワイエット!) by Kana Ueda, Mai Goto, Rina Satou, Kaori Shimizu and Mamiko Noto, the various voice actresses for the main characters of the anime. The second season's opening theme is "Chōhatsu Cherry Heart" (挑発 Cherry Heart) by Milan Himemiya and Chocolate Rockers. The ending theme is "Himitsu Suishō! Uru to Love" (秘密推奨！うるとLOVE) by Kana Ueda, Mai Goto, Rina Satō, Kaori Shimizu and Mamiko Noto.