While home alone one night, Fukumaru spots Moja, a cat he knew from his pet shop days, outside his window. Moja is beaten and bruised, but when Fukumaru tries to get his attention, he flees. Desperate to find his old friend, Fukumaru runs out of the house when Mr. Kanda comes home and soon finds himself lost. Mr. Kanda finds Moja and reunites him with his family. He becomes increasingly worried about Fukumaru and doesn't rest until he locates his beloved pet.

"First published in Japan in 2020 by Square Enix Co., Ltd"--Copyright page. Translated from the Japanese. Printed Manga-style; book opens from left to right. Pages are read from right to left.