Quick answer — The Disappearance of Nagato Yuki-chan: the opening theme is "Fure Fure Mirai" and the ending theme is "Arigatou, Daisuki".
This spin-off of the Haruhi Suzumiya series takes place in the world of the "Disappearance" arc of the original novels, focusing on the high school life (and romance!) of a tentative and bashful Yuki Nagato quite unlike the one you've come to know and love through the usual exploits of the SOS Brigade... but no less… Produced by Satelight, this comedy, romance, and slice of life series premiered in Spring 2015. The series spans 16 episodes and is currently finished.
Also known as: La Disparition de Yuki Nagato
The Disappearance of Nagato Yuki-chan has 16 episodes and is finished.
The Disappearance of Nagato Yuki-chan was produced by Satelight and released in 2015.
The Disappearance of Nagato Yuki-chan is classified under Comedy, Romance, Slice of Life.
The Disappearance of Nagato Yuki-chan premiered in Spring 2015.
The opening theme of The Disappearance of Nagato Yuki-chan is "Fure Fure Mirai".
The ending theme of The Disappearance of Nagato Yuki-chan is "Arigatou, Daisuki".
The Disappearance of Nagato Yuki-chan is based on a manga.
The Disappearance of Nagato Yuki-chan is listed on Hulu, Crunchyroll. Availability varies by region.
Character data from AniList.
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