Quick ReactionAh...There's something over there. I think it's...Huh!?It's a yu-
Ayumu hears this as "U-"ZoomWhat did you say? A UMA?~Pant~~Pant~What...A yuuransen~!
Yuuransen meaning "sightseeing boat". Its initial syllable suggests to Ayumu that You might have seen a "UMA" (cryptid).