Kerokero Keroppi no Kero Kero House no Himitsu
English title: Keroppi in the Frog's Secret House
Japanese title: けろけろけろっぴのけろけろハウスのひみつ
Type: OVA
Episodes: 1
Source: Unknown
Genres: Fantasy
Producers: Sanrio
Duration: 30 min
Rating: G - All Ages

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.