Kero Kero Keroppi no Bouken Nikki: Nemureru Mori no Keroleen

Kero Kero Keroppi no Bouken Nikki: Nemureru Mori no Keroleen ("The Adventure Diary of Keroppi KeroKero: Keroleen in the Sleeping Forest") is an RPG/adventure game starring KeroKeroKeroppi, the frog character of the Sanrio Hello Kitty universe. His girlfriend Keroleen disappears while the two of them are on a picnic, and he must explore the surrounding lands and talk to NPCs for clues. Most of the NPCs are other Sanrio characters, including Hello Kitty.

Kero Kero Keroppi no Bouken Nikki is the spiritual sequel to the Kero Kero Keroppi no Daibouken games for Famicom, which were also published by Character Soft.