距今约5000年前，云集着智者和贤达的神秘之岛亚特兰大陆一夜之间沉没。大西洋底的波塞冬族向亚特兰大陆的飞龙族发起进攻，在强大邪恶的攻势之下，飞龙族彻底覆灭。飞龙族首领将其尚在襁褓中的儿子托付给白海豚露卡（北浜晴子 音），露卡把婴儿藏到日本海附近的猪首岬岩洞中。最终，好心的渔夫一平（八奈見乗児 音）发现了婴儿，将其带回家抚养。13年后，阿龙（塩屋翼 音）已经成长一个少年。是时村中遭到海怪袭击，阿龙在露卡的引导下找到海龟梅顿，终于从它的口中得知自己的身世。一曾迷惑的阿龙最终选择披上红色披风，拿起短剑，和露卡向着波塞冬族占领的大西洋进发…… 本片根据手冢治虫同名原著漫画改编。
Tanaka Tetsuro is excited at getting a full scholarship at a new high school, far away from his family. What he does not know is that he will be the only boy in an all girl school, and that there is a girl head-over-heels in love with him, waiting for his arrival. But his special friendship with the very cute and dynamic Asuka also causes him to get into a lot of trouble with the powerful student council leadership, as they are at open war with Asuka and her five friends, a group of super amazon warriors called the Koi Koi Seven.
在地球的某个地方，每天享受着【怪物】，过着平凡的日常生活的奥拉贡，他没有朋友……。有一天，奥拉昆被拉进了一个不可思议的空间。神秘的怪人出现在那里，告知了冲击性的事实……【蒙斯特】，进入被称为好球世界的世界，那个世界在半年后，被强大的敌人毁灭！奥拉昆为了拯救好球世界，一起战斗的伙伴=聚集朋友！奥拉昆能否召集同伴拯救好球世界？？新的战斗现在，开始！！
