Kero Kero Keroppi no Kero Kero House no Himitsu · けろけろけろっぴのけろけろハウスのひみつ OVA 1 episodes Finished Fall 1993 ★ MAL — Fantasy Synopsis On a rainy day Keroppi and friends find their elders' old secret club house. But the house ends up being more magical than they thought. Studios: Sanrio