Reimu and Marisa observe as Remilia and Flandre fight each other. However, they are surprised when the two sisters reconciliate and decide to fight together in a two-on-two battle against them. Back at Moriya Shrine, when Marisa concludes the story of the Scarlet Mist Incident, the party goes out of control when Flandre shows up. Annoyed by the fact Remilia ate her pudding before leaving the SDM, Flandre starts fighting her older sister on the spot, wreaking a havoc in the shrine. An ordinary ending for an ordinary night in Gensokyo... After the credits, we see Nitori Kawashiro (who was (literaly) kicked out of the Moriya Shrine by Kanako) observing Nazrin and Shou Tomarou who found and are about to free Byakuren Hijiri.
承接上集剧情，吸血鬼姐妹在一阵打斗后，最终决定齐心协力共同对抗在洋馆之外偶遇的灵梦和魔理沙。在眼花缭乱的弹幕大战之后，博丽巫女使出了终极法术“梦想封印挨尼玛的球！”，但画面显示的分明是阴阳鬼神玉……不管怎样，红魔馆剧烈的爆炸为精彩的战斗画上圆满的句号。
大家的回忆刚刚结束，芙兰朵露怒气冲冲地闯入守矢神社，宴会立即失去了控制。灵梦幸灾乐祸地看着守矢神社被破坏。
红雾异变之章在「残響は鳴り止まず」（原曲：「上海红茶馆 ～ Chinese Tea」）的歌声中结束。本片最后，被逐出宴会的河童河城荷取在半路上发现一个鼠妖和一个虎妖正预备解救一个被封印的女子，为东方星莲船埋下伏笔。又一巨坑已挖。
