Konjiki no Gash Bell!!: 101 Banme no Mamono

During a summer picnic outing on Fuji Mountain, Gash and his friends meet Kotoha, a girl with a white magical book that contains a message claiming Gash's mother is in a nearby cave. However, upon finding the cave, they encounter Wiseman, a blond-haired youth who is being held captive. To rescue Wiseman, Gash and his friends venture into the cave and stumble upon a portal to another world. A powerful warrior, the Black Knight, appears, accusing Gash of stealing the 101st magical book and threatening to attack. With only 24 hours to clear his name, Gash and his friend Kiyomaro must find the real culprit and prevent being trapped in the alternative world forever.