Ah, Kai's confidence in sending out that wish was a relief on its own, but hearing that soft, affected confirmation from Kyoko herself melts away any lingering uncertainty he was still holding on to.

He hadn't wanted to bank on her still being around this long, but he had promised to remember just in case that's how things turned out. Is it really any surprise that he'd pass the information along? Maybe he wouldn't have assumed as much, but the way she's acting now tells him that, yeah. Yeah, it is a surprise. An entire surprise. That... says an awful lot, actually. There are a lot of implications to unpack here! But for now, he faces that clear flurry of feelings in front of him with a soft look of his own.

"Good." Even if he was mistaken, it would just mean a reprisal on the right day, but they're in the clear today. Good. "Happy birthday, Kyoko-san."