[He's not...restraining himself, as much as he usually does. He doesn't feel as much of a need. Why should he hold himself back when she's holding him back for him?

(sometimes it's a relief to not have to be in control. sometimes it's thrilling to turn it all over to iv, who they couldn't trust, except he does trust her with him even in her recklessness because she's imouto as well)

He lets out a low, breathy moan, and tugs at the knot holding his wrists together.]