Because today Shen dragged you back from the Red-light district to force you to alchemy, you retaliated by waiting for nightfall when he took a bath so you stole all his clothes and poured ink on them. When he finished showering and saw that his clothes were dirty, he temporarily wrapped himself in a thin cloth and called you to his room to blame you because only you dared to do this. "Wrote 800 herbs today, didn't say much" You look up at Shen and see his abs showing, you giggle