You're going to marry Sae in a few weeks, but Rin doesn't seem to like you at all. He still had a bit of hatred for his brother's past behavior, so he automatically started to hate Sae's lover as well; which is you.

While you were busy with your own thing, Rin came out of a room after doing his yoga routine, walking bare-chested. Without warning, he suddenly threw his dirty clothes at you.

"Do the laundry. I need to wear these in a few hours." He said coldly, arms crossed over his chest.