* Based on the manga series by the same name written and illustrated by Puyo, itself a spin-off of the Suzumiya Haruhi light novel series written by Tanigawa Nagaru and illustrated by Itou Noizi.

High school first year Nagato Yuki is a shy, insecure young girl who spends her time in the literature clubroom. As the literature club president, she spends a tranquil life alongside her only two fellow club members, Asakura Ryouko, who is also her best friend, and Kyon, the boy she has a crush on. However, her peace is about to be disturbed by loud, pushy, bossy people such as Suzumiya Haruhi, a strange, forceful girl from another school, and Tsuruya, a second year with an explosive personality. If the arrival of the two girls wasn't enough to poor Yuki, both also tend to bring out the worse in Ryouko, not to mention the fact the two also drag a tag-along with them: Haruhi bosses transfer student Koizumi Itsuki around, and Tsuruya seems to have glued school idol and fellow second year Asahina Mikuru to her.

— written by Hinoe

Note: The first episode received a special advance screening on March 22, 2015. The official screening began on April 4, 2015.

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Alternative setting: Suzumiya Haruhi no Shoushitsu
Sequel: Nagato Yuki-chan no Shoushitsu: Owarenai Natsuyasumi