[Fan no Hitori] Taimabu S4 Gesuidou Hen 4 [biribiri]

Three schoolgirl warriors clash with a massive tentacled monster in a grim urban drain, the central swordswoman urging her comrades to finish the extermination while the battle intensifies. As the creature's surge overwhelms them, the fight spills into a chaotic surge tank where the combatants are drenched and overwhelmed by the relentless wave. The climax showcases a frantic, wet onslaught as the heroines struggle against the monstrous tide.