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

Nagato Yuki-chan no Shoushitsu: Owarenai Natsuyasumi

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