This OVA is especially for Nyanko-sensei fans.
He is the best in combination with Natsume. In Nyanko-form he is like a spoiled little brother. In Madara-form he is more of the caring big brother.
So it's no wonder he is generally good with kids and a perfect nanny as seen here.
The kids were adorable and I liked the repetitive actions after certain scenes. It's kind of a running gag and I had to chuckle more each time it happened.