拾ったのが本当に猫かは疑わしい, I'm Not Sure If the Cat I Found is Actually a Cat., Hirotta No Ga Hontoni Neko Ka Ha Utagawashi

On her way home after being dumped by her boyfriend of seven years, Honda Kaoru picks up a black lump she assumes is a cat. But its true identity turns out to be… a creature that speaks human language and even enjoys drinking alcohol—a cat(?)!? Kaoru names the strange being Modoki, who stubbornly insists he’s a cat, and the two begin living together. As Kaoru spends her days with Modoki, her bleak, worn-down everyday life slowly starts to change…? Winner of the 6th Alphapolis Light Literature Award (Grand Prize), this slightly humorous yet heartwarming, fluffy-and-gentle story finally gets its long-awaited manga adaptation!