UFO Princess Valkyrie

Kazuto Tokino is struggling to keep his late grandfather's public bath running when a spacecraft crashes nearby and brings Princess Valkyrie into his life. In order to save him after the accident, Valkyrie gives Kazuto part of her soul, binding the two together in a way neither can simply undo.

Losing that portion of her soul causes Valkyrie to spend much of her time in the body and mindset of a small child, only returning to her adult form under special circumstances. Between other space princesses, family troubles, and the bathhouse's customers, Kazuto's home becomes a center for cosmic problems entirely unsuited to his quiet life. Even so, his bond with Valkyrie deepens as they try to create something normal from a relationship that began with a crash from space.