永夜異変の章（前編）

The residents of Gensokyo begin to suspect that something is wrong with the moon, and that, the night does not seem to end. Marisa and Alice go out to find the culprit for this imperishable night. After defeating Mystia Lorelei and Wriggle Nightbug, Alice and Marisa go to the Human Village, where Keine Kamishirasawa says the culprit is in the Bamboo Forest of the Lost. Arriving there, they are confronted by Reimu and Yukari Yakumo, who were also investigating the incident. The magicians think that Yukari and Reimu are the culprits, and a battle begins. During his battle against Reimu, Marisa accidentally sets fire to Eientei, and Reimu reveals that the culprit for this incident is there. After this, Reisen Udongein appears to confront them...

这一集开启了《东方永夜抄》的故事。满福神社目前制作的剧集最多的章节。系列的片头曲为《泡沫，悲哀的桃源》。 受月之公主蓬莱山辉夜的委托，八意永琳用秘术将幻想乡的月亮替换成假的。红魔馆一行人发现了月亮的异常。八云紫则找到博丽巫女解决异变。刚来幻想乡的东风谷早苗跟随西行寺幽幽子和魂魄妖梦，慢悠悠地上路了。本集着重于原版游戏中“咏唱组”（即魔理沙和爱丽丝）的情节。决心比灵梦快一步解决异变的魔理沙与爱丽丝·玛格特罗依德在迷途竹林遇到了博丽灵梦她们。在一番打斗之后，一行人发现了隐藏在迷途竹林深处的秘密……这一集透露了雾雨魔理沙离开家人的原因：她嫌妈妈太多管闲事了。注意原作没有提及离开的具体原因。 片尾曲是「共鳴しない愛のカタチ」（原曲：《东方永夜抄》第三关背景音乐《令人怀念的东方之血 ～ Old World》）。片尾也展示了插画师Tsubameyado精美的剪纸。