When the mantis-like aliens known as Kiseichuu descend on Earth, they have one goal: eradicate the human race. They do so by absorbing humans' H-energy–the sexual passion that fuels so many people and keep...

There was once a hero who was summoned to another world, and he saved that world. However, the man was caught in a "trap" and was forcibly returned to his original world. On top of that, he had to start over...