The Soulmate AU where when you write/draw/paint on yourself it appears on your soulmate's skin.
AU where Victor and Yuuri are painters.
They had built their relationship up from the foundation that they always had: communication.
When two Soulmates are both of age, they will share something. What's your is mine, and mine, yours.
When you turn 18, You draw upon your skin, and it shows upon your soulmates skin also, however, you can't receive theirs until they are 18.