Neko no Machi no Ko  

The Children of the City of Cats, We Love Shirou, Sora Moyou, Skyscape, 猫の街の子

A tea house from before World War II has a number of homeless cats living there. One young boy wants to make friends with them. After the mother cat vanished, Shiloh and the other cats locked themselves inside Awara-ya. Since he's the only domesticated one, Shiloh decides to take charge as their guardian.