Katte ni Kaizou

A 17-year-old high school student with a strong belief in science fiction, aliens, ghosts, and conspiracies thinks that all strange occurrences are part of an alien plot to conquer the world. The stories are mostly standalone and unusual. He joins the school's science club, meets new friends, and encounters various odd phenomena such as log people, lethal sushi, pee-blades, terrifying infections, robot invasions, ghosts, living dolls, and other strange elements. A one-shot is also included in Volume 13.