The Disappearance of Nagato Yuki-chan: I Cannot Let Summer Break End
Original Title：長門有希ちゃんの消失 終われない夏休み
Languages:
- English: The Disappearance of Nagato Yuki-chan: I Cannot Let Summer Break End
- Japanese: 長門有希ちゃんの消失 終われない夏休み
- Chinese: 长门有希的消失 无法结束的暑假
"The Disappearance of Nagato Yuki-chan: I Cannot Let Summer Break End" is an OVA episode of the anime "The Disappearance of Nagato Yuki-chan," released on October 26, 2015, bundled with the limited edition of the ninth volume of the manga. This OVA, based on Chapter 38 of the manga, is an homage to the "Endless Eight" story from "The Melancholy of Haruhi Suzumiya." The story revolves around the members of the Literature Club as they struggle to finish their summer homework before the break ends. They first go to a swimming pool and then gather at Kyon’s house for a study session. Due to Haruhi’s distractions, Kyon and the others fail to finish their homework, forcing Kyon to copy Yuki’s homework on the last day. This OVA has not been officially dubbed into other languages, though a subtitled version appears as a bonus feature in the boxed set of "The Disappearance of Nagato Yuki-chan."