The Disappearance of Nagato Yuki-chan: I Cannot Let Summer Break End

Alternative names: The Disappearance of Nagato Yuki-chan: I Cannot Let Summer Break End; Nagato Yuki-chan no Shoushitsu: Owarenai Natsuyasumi; Nagato Yuki-chan no Shoushitsu OVA; The Vanishing of Nagato Yuki-chan OVA; 長門有希ちゃんの消失 第17話「終われない夏休み」