"Ooh, and here I thought I left you off pretty easy," Jungkook snickers, rubbing a hand over the spot that Yoongi smacked. Maybe it's the backdrop of Busan that emboldens him, far away from anyone they know, or maybe it's simply the passage of time that makes Jungkook lean further and further into this relationship, unwilling to hold back all of the love and sentiment he feels for Yoongi. Whatever the reason, his eyes shine wickedly now, Jungkook leaning in to make sure no one else overhears, that no one can glance over and read his lips.

"I wondered earlier if there was anything we could get away with on the train. You know, when our trays were down and everything," he murmurs, meeting Yoongi's gaze as he bites at his lower lip, grinning before leaning back and scrambling away again, lest Yoongi spank him again.

Jungkook rushes ahead, seeking the shelter of a busy queue lined up around a hotteok vendor, the smell of frying dough wafting through the air.