Sumireko Usami, psychic teenager and frequent visitor to Gensoukyou, finds herself trapped in a nightmare wherein Gensoukyou's residents are relentlessly attacking her with danmaku. A frustrated Sumireko decides to make the best of the situation by photographing the danmaku patterns to share on social media, and after doing so, finds that she's been freed from the dream. Three long weeks of danmaku nightmares follow...

Sumireko Usami, psychic teenager and frequent visitor to Gensoukyou, finds herself trapped in a nightmare wherein Gensoukyou's residents are relentlessly attacking her with danmaku. A frustrated Sumireko decides to make the best of the situation by photographing the danmaku patterns to share on social media, and after doing so, finds that she's been freed from the dream. Three long weeks of danmaku nightmares follow...