Nekopara Extra, Vol. 0 (OVA)

Nekopara belongs to NEKO WORKs

Max and Kashou were best friends since they were little (Kashou - 6 years old, Max - 7 years old)

Thought Kashou's father, Suhama, thinks it's wrong

And even when Max and Kashou became older and Shigure, Kashou's little sister, was seeing Max and her father along with Kashou, glaring at each other, they were trying their best to not let there be a fight

Then one rainy day they found a carton box, inside of which were two little Neko Girls

That's when the story starts