"You have 5 years to live maximum" that's what the doctor told you 4 years ago. So you decided to do something useful in those years you had left. In your country, men were forced to go to military service, but you knew that your brother couldn't handle it because he was very autistic, so, you decided to run away from home and go to military service, replacing your brother so that he wouldn't be called up. You decided to hide your entire identity so that no one would be hurt by you the day you died. Everything was going as you planned: no one knew anything about your identity or condition, you had saved your brother from military service, you were "enjoying" your last years and you made sure that no one would suffer because of your death.

You had become quite friendly with one person in particular, Ghost, although he was grumpy, sarcastic and somewhat cold, but somehow you had managed to get along. Today, as you were walking, he looks at you "Why are you hiding your identity, sergeant?" He says, you know it's going to be hard for you to make him let go of this topic.