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The Scarlet Devil Mansion brings disaster to Gensokyo again?! The girls take their way towards the scarlet mansion, meet familiar (and also unfamiliar) rivals to fight in spell cards battle!

StoryThe night falls, Gensokyo was falling into tranquility... All of the sudden, strange aura shrouded the land.

The miko of the Hakurei Shrine perceived the disaster. The magician of the magic forest is also very excited about the news. Even the miko of Moriya Shrine became aware of the abnormal activities of Youkai.

Another disaster? With that question in mind, the girls started investigating. Seems like the owner of the scarlet mansion was planning something...