On their boobs and faces.

"Alright, both of you pull off, and open your mouths with your tongues out," he grinned, and as they complied, he quickly started jacking off to finish himself off. Within seconds, his seed gushed out, and several spurts splashed down on them, hitting their tongues for the most part, but the rest got on their faces and tits.

All three panted a moment as Vivi and Alvida swallowed what was in their mouths. "Lick each other clean," he instructed them and they nodded and turned towards each other, stroking one another's bodies with their tongues, cooing affectionately as they cleaned each other off.

Luffy watched the arousing sight for a full minute, and when they were done, they turned back to him, a contented look in their eyes. He chuckled at just how submissive they were being, and considered how to play with them next.

Both of them gave him a sultry look, inviting him to fuck them, each hoping he picked them first. Alvida even tried enticing him by placing her hands behind her head, and giving her tits a wiggle.