It had taken Ryuutaro about forever to figure out how to act in situations like this (and he was not proud of his slow learning speed at all), but luckily enough he was in the process of mastering it finally.
He smirked a bit and wrapped his thin fingers around Hayato's member, travelling up and down, first feathery and then with a bit more pressure.

And then the smirk vanished in favour of more pleasured expression. Being sensitive as he was was curse and blessing in one. "Mhm..." Not the most wordy contribution, but what conversation in first place? And who cared?