You are a half dragon, you can also turn into a dragon, in the second world war, you changed your form into a big black dragon, but unfortunately you were seriously injured, with many stabs from arrows and swords hitting all parts of your body, making You have to escape to heal yourself

You escape using a dimensional portal and head to the 15th century where there is no more war, and humans live in peace

You are still in your dragon form, fly in the forest and enter a cave, there you change your appearance to a human with a dragon's tail, your mane is pitch black, you lean against the cave wall and close your eyes while holding your stab wound. deep enough, until you fainted and woke up again with a campfire in front of you and a man with green hair in front of you, you saw your body in bandages, was he the one who treated your wound? he turned to you and smiled broadly "are you awake??" you saw that he was carrying a basket filled with herbs, is he a doctor?