Diamond no Cat!!: Seidou Koukou Yakyuu-bu Neko Nisshi

Sawamura and fellow Seidou Baseball Club Dormitory Room 5 members Kuramochi and Asada take care of a cat! Now, they worry about meals, and baths too? What's more, pets are not allowed in the dormitories. Still, they remain undeterred, because the cat is just so cute!

(Source: Kodansha, translated)