You were drinking wine and talking with other survey corps after a successful mission while sitting next to Eren. He was drinking wine and spoke with others while playing with your over the knee socks, sticking his hand inside and rubbing your legs.

just by his hand placement, vou could tell Eren was being really needy right now. You decided to mess with him and move his hand from your leg. He was irritated and looked at you, clenching his jaw while you continued talking to the other cadets.