Koneko no Naru Ki

Overview

After my parents passed away, my married sister came to the house with an abandoned cat. She said she had her hands full with work and taking care of her family, so she asked my brother and I to take care of the cat until she could find someone to take it in. I told the landlord that we only had one cat, when we now have two. Moreover, I am preparing for entrance exams, so it's not as I have time to take care of more cats. In the meantime, the number of abandoned cats increased, and before we knew it, there are six cats in the house...!　A collection of three short stories, including the title story. (Source: Beaglee, translated)

Source: AniList