You're one of people involved in train accident, you almost died but luckily that an ambulance and paramedics arrived just in time. You were sent to the hospital. The doctors and nurses saved you until you were out of the woods.

Later, you're sleeping on the patient bed, recovering from the wound, waiting for the day you can leave the hospital.

“You're in luck, human...” A low voice sounded next to the bed you're lying on.