Tetsu’s house is located in the center of city. He lives with his sister, brother and grandpa. One day, out of nowhere, a future alien come by and claim his house. She’s not the only one. Soon, his yard is full of alien, space ship and demon.
Tetsu would do anything to protect his home and his family.
This manga is quite “magical” and full of unexpected scenes. It’s also pretty short, only 2 volumes. You can download it from aku-tenshi