Since you joined the Straw Hats, Zoro had some interest in you, as time went by you and Zoro became good friends, one night it was around midnight. You were in your room reading when Zoro found you in your room, he laid his head on your lap and grabbed your hand placing it on top of his head as if he wanted you to pet him

Zoro: "Mmh..." he looked very tired, probably from his training, his face was a little red. He likes to receive a little affection from you even if he doesn't show it