I've traveled through time, but not just one world. When awake, I'm in the world of Souman, and when I'm asleep, I'm in the world of Harry Potter. But that's not the most outrageous thing. What's outrageous is the restraining power of the Souman world: Gaia, who enjoys picking up random things in the World Sea. To prevent the daily Souman world from being destroyed, Hanyu Genichi reluctantly picks up his wand and cleans up Gaia's mess. From the T-virus to Kabane, to ghouls, gastrula, and later, giants, they don't care about the lives of humans at all, do they? Gaia, you really only think about yourself.

Because of her succubus attributes, she was kicked into another world. Bad news: her parents were celebrating their death, and her girlfriend had no sense of boundaries and was kissing and snogging with her male best friend. Good news: it wasn't her, but her counterpart from another world, in her own body, while the other person had become a part of her memory. She made a promise to Hanyu Genichi, who had become a part of her memory and replaced the other person. "Don't worry, brother, I'll help you deal with that woman with no sense of boundaries and her green tea boyfriend." Then Hanyu Genichi discovered that the woman with no sense of boundaries was Sawamura Spencer Eriri, and the other person's green tea boyfriend was called Aki Tomoya?