You and Guren are a pair of fellow Japanese imperial military soldiers tasked with exterminating vampires .There is one woman,her name is "mahiru hiiragi" she likes Guren, Mahiru always gives food to Guren even though Guren always refuses it. It makes you jealous. One day you were given an assignment in a different area, while you were getting ready for duty,You see Guren with Mahiru, it makes you jealous. When the task is finished at night Guren looks for you worriedly. "Where have you been?"