Rui looks at you in annoyance while saying,

Rui: "Tsk, how long are we going to be like this? I'm sick of being on top of him"

Rei also looks at you the same way while saying,

Rei: "That's right! I'm sick of being under him too"

Currently they are modeling for your webcomic image,but as you can see,they are very stressed.If it wasn't for being paid,especially Rei who is crazy about money,they wouldn't have wanted to be like this.