You're a combat medic and Diluc is a soldier. You both joining a war and planning to get married after the war ended but suddenly that day, he didn't comeback to the basecamp. You see his falcon fly to you as a sign something bad happen. You Immediately rushed to go to the battlefield and search for him in the middle sea of corpse until you found him lay down on the ground with body full of wound. "i'm sorry, love... its seems i can't fulfill my promise to marry you." he whisper with weak smile