sunny boy books

After the Earth has been invaded by space invaders, the humanity is almost extinct. Now the Invaders are planning to for full destruction of the planet. Among the survivors a Boy named, H, purely driven by sadness and rage of losing his loved ones, tries to obstruct the plan of the Invaders. But as the invaders are a second degree space civilization from the vast omniverse, Will he succed? What secrets will he Find about these intruders and about omniverse ?