How to Mess with a Feisty Kitten
老犬とわたし~妹は64歳になりました~ · ろうけん と わたし いもうと わ ろくじゅうよんさい に なりました
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Dogs age faster than humans. Their fur changes and their eyes turn white. This moving omnibus essay depicts the final days of five pairs of elderly dogs and their owners as they live with these changes. (Source: Kodansha, translated)
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections