Shidou Itsuka is the main character in Date A Live. He lives with his smaller sister Kotori and has an ordinary life. Do to drastic change of events he ends up in close proximity to a spacequake which leads him to his first encounter with Tohka. Turns out that his sister arranged that meeting and is in need of his assistance. The truth behind the spacequakes is that they're caused by Spirits who crash on Earth. Shidou is one of the few people who can seal their powers. Thanks to this talent he seals Tohka's power to spread chaos on the planet. But she's not the only one that has her power sealed by him. More and more Spirits that he's forced to handle appear. Not long after he finds himself surrounded with a harem of girls.