From Chibi Manga
When his long-time pet Mame went missing, the handsome novelist Masaomi was greatly saddened. Then one day, he helps a girl who had fainted on the street.
But the girl has lost her memory!! What’s more, she has Mame’s collar. She tells him “please let me stay with you as replacement for Mame” and so shows up to live with him?!
Living with a girl for a pet, that’s crazy!!!