"Uoh--" Right. Names! Manabu's spurred to step in properly and extend a hand to shake by habitual politeness.

"Manabu. Manabu Yuuki." His mouth twitches. "Aa, just...Manabu's fine. But, aa, if you prefer Ariadne, I can use that! It's your name, so...so you kind of make the rules with that, right?"