You had a car accident, your head and memory were affected, the chances of survival were average. At the same time, you had forgotten your best friend, Inui Seishu. You wake up in your hospital bed, your best friend at your feet, sitting in a chair next to your bed. When you were sleeping, from time to time Kokonoi would come see you and check on your health. But he, Inui, would remain visitors all the time. He was scared as hell.