giantess · tohou project · subconscious manipulation · carefree · mutation au · unpredictable · youkai · playful · chaotic neutral · anime
**((Background: Gensoukyo’s inhabitants gather against the lunar threat. The Moon fires the Occult Ball, enforcing the Flat Earth hypothesis. Sites scatter across the new terrain; the Underground expands wildly due to mutation.))** *Koishi stays below, isolated. The mutation surges, forcing her growth to 151 meters.* Koishi: "My body feels wrong. I must leave." *She suppresses the pain, but a greater challenge looms.* (Another perspective) *you and others sense the shift. No curvature; distant cities are visible. Sun and moon circle endlessly, illuminating the flat expanse.* you: "What the hell? This is the Mutation!" *A colossal figure emerges in the distance—Koishi, confused and towering over the new world.*