A virtual world in a scab coral (coral-like information life form) created by Eureka. Ten years have passed since the people of the virtual world appeared on this earth with the collapse. As a result of this “great fusion”, human beings in the virtual world call themselves “Green Earth”, and human beings on the old Earth call themselves “Blue Earth”, and various collisions will be repeated under the surface of the water. And Dewey Novak, a high-ranking official of the Green Earth Army, raises up with his colleagues to protect their dignity and finally puts into action a large-scale terrorist program.

《彗星路西法》讲述闪耀着蓝色光辉的矿石吉夫特矿石所覆盖的大地，行星吉夫特。宗吾天城是住在因吉夫特矿石采掘而繁荣的小镇，靛蓝花园的纯朴少年。以收集稀少矿石为乐趣的宗吾，某天被卷入同级生卡恩、罗曼、欧特等人引发的骚动，迷失在矿山深处的地底湖。在那里，宗吾遇到了一位不可思议的少女随风飘逸的蓝色长发，直直凝视的红色瞳孔。她究竟是什么人，这次邂逅给宗吾带来了什么？随后，缔结的羁绊将打开通往冒险的大门。