This story is about The Mystery Of Demon Sword One day, class 5A7 make a trip to Mountain Minahiro But something bad has happend Shin Kurosaki,Keito Ken,Mirane Miho and Natsune Tetsuya Was trap underground because of the earthquake Then ,they discover a mysterious door underground They all go through the door with hope that they will found the way up. That door was connect through another world They need to find 4 Legendary Demon Sword before The Evil Group found it The evil group are called 'Dark Spirit' They will do anything to get that 4 Legendary Demon Sword
4 parts