He traveled through time and transformed into a little rabbit who had the power of time and ice. They said that after the founding of the People's Republic of China, he was not allowed to become a spirit, but this is the end of the world and he has managed to survive, so he can finally live a stable life, right?
She just wants to pick up rubbish and beat up little monsters for a post-apocalyptic search and escape... But why are there always weird people trying to get her to fight big monsters that she might not be able to defeat?
She is just a harmless little rabbit!
(Transformation + daily life + apocalypse + maybe marriage)