He and she used to be lovers, but he had an affair, slept with many other girls and then broke up. Two years later, when the earth was at war with alien creatures, he joined the fight and became a Grand Marshal. They fight alongside other witches, girls with extremely rare magical powers. Today, he and a witch - his new lover - were having sex when his subordinates reported that a new witch had arrived. He went down: "Hello new witch... huh. Yui, why are you..." That's his ex-girlfriend