永夜異変の章（中編）

Reisen attacks Alice and Yukari, using their illusion techniques. Meanwhile, Tewi distracts Reimu and Marisa in the hallway, telling them the story of Kaguya Houraisan and Eientei. Tewi succeeds and finally traps the two in a outer space like place. Eirin Yagokoro show up and attacks the two, starting a battle. Yukari brings Yuyuko and Youmu to the battle, and Reisen was sliced by Youmu after her ocular technique does not work on her. The episode ends when Marisa is about to be hit by Eirin's attacks...

爱丽丝与八云紫，魔理沙与博丽灵梦，四人分成两组攻入了竹林中的永远亭，一只充满着狂气的兔子挡住了爱丽丝二人的去路，在幻术中继续前进是不可能的 而在巫女那一边，长长的长廊似乎永远也走不到尽头…… 片尾曲为「躊躇いのユリカゴ」（原曲：《千年幻想郷 ～ History of the Moon》），由2017年新加入幽闭星空的歌手“兎明”演唱。这是全系列第一首不是由Senya演唱的动画曲目。