UFO Princess Valkyrie 2: Juunigatsu no Yasoukyoku

Life around Kazuto and Valkyrie becomes stranger when the Key of Time suddenly appears and a series of unexplained incidents begins to follow it. At the center of the disturbances is a woman known as Valkyrie Ghost, whose fixation on Kazuto makes her an enemy that cannot simply be ignored.

Valkyrie, Akina, Hydra, and their friends join forces against the mysterious newcomer, but every confrontation raises new questions. Searching for the truth behind Valkyrie Ghost gradually pulls them toward secrets buried in Valhalla's past and toward a threat tied much more closely to Valkyrie than they first realize.