[Yuuri's jolted out of his thoughts by the outburst, though he just blinks rapidly at Minami, like he can't figure out why that would be so surprising.]

I...guess? [Not exactly a firm answer, but Yuuri himself doesn't look too bothered. More...perplexed, as he tries to explain it.] Yuuko was the only one, and that was a long time ago. After I moved to Detroit, I got so busy that I never really had time for relationships.

[His reluctance to open up to other people might've had something to do with it, too, though Yuuri supposes they'll never really know now.]