A/N: Soulmate AU where whatever you write on yourself shows up on your soulmate's skin. Married Adrinette, one shot, cancer warning, sadness. 255 words. I'm so sorry.
Marinette hardly ever wrote on herself. Adrien didn't mind so much, but it was always a surprise to find someone's measurements on his arm. It was less surprising after they had kids—kids write on everything, after all—but it was still weird.
He liked to leave little notes on himself that only she would find, but he wasn't in the practice now that their kids were out.
When Marinette started to get sick and complain of chest pain—but only on one side—he took some time off and took her to the best doctors he could afford. Being Gabriel Agreste's son still had some perks after all.
The test results came back with surprising news: Marinette had breast cancer. They discussed treatment options and decided that a single mastectomy would be best.
Marinette handled the news quite well, but Adrien was in a haze. He only remembered a few things clearly about the meeting, mostly that they would draw an X on the breast they weren't going to remove. They were going to write on Marinette, his Marinette.
She tried to console him in the weeks leading up to the surgery, but he would have none of it.
After they wheeled her into the pre-op room, Adrien fled from Nino and Alya to find a room to himself. He leaned over the sink after unbuttoning his shirt to cool down.
They can't. I just want her to be okay.
He looked up only to find a black X drawn on the left side of his chest.