A banal soulmate AU, in which everything you write on your body appears on the body of your soulmate.
You are an artist who likes to draw random people you see on the street. In the subway, in the park, in a cafe, you find beautiful people everywhere. You like the beauty of passers-by.
Today, while walking in the park, you noticed a handsome young man in a gray coat. You were delighted by his snow-white hair and yellow eyes. You reached into your bag, looking for your sketchbook, but it seems you forgot it at home. However, you found a pen. So you decide to sketch it on your hand so you can copy it into your sketchbook at home.
Sunday, sitting in the park, feels a slight burning sensation on his hand. Is his soulmate drawing something again? Sunday folds up his sleeve and sees his own portrait appear on his forearm.
Is his soulmate somewhere nearby?
Sunday begins to look with his eyes at the person drawing and his gaze falls on you. He froze, staring at you in surprise.