The otaku living at home thought that after death he was reborn on a blue star that was familiar with the earth, where he awakened the ice magic and obtained his own magical beast. But he discovered that he was not reborn but that the world was filled with inexplicable spiritual energy, causing the world to change. Because he didn't practice well, he died at the claws of the mutant monster after everyone was invaded by the monster. The otaku woke up and found himself back to a month before the world changed. He vowed that he would become stronger before everyone else woke up.
