Busou Shinki: Armored War Goddess (2012)

S1E7 The Visitor Comes With the Sound of Rain

A sudden downpour catches the Shinkis off guard, and they rush out into the storm to find their missing master. What they stumble upon, however, seems far beyond the ordinary—a mysterious presence that feels otherworldly. But as the rain pours down and shadows twist, the truth behind this eerie encounter may be closer to home than they ever imagined.