The story is about class 3-E of Kunugigaoka Middle School, where every morning they greet their teacher with a massive firing squad. The teacher is a weird combination of an alien and a octopus that moves at...

Alien invasions come in all shapes and sizes. This time, Earth is under attack by "Unknown Codes" that infiltrate digital devices to eviscerate the human race. The only way to counter these codes is to play ...