In Kowloon Youma Gakuenki: Origin of Adventure emotion is essential. There are nine emotions to interact with each character. By the chosen emotion it will help your relationship grow to ponder with the character. Some will become an ally to share adventures with you and sometimes they will influence the flow of the story.
Along the adventure, many challenges and tough enemies await in the historic ruins. While interchanging between school parts and dungeon parts solve all the mysteries to completely clear the ruins.