Mina finished brushing her teeth and burst into the living room. She skidded to a halt in front of Tzuyu, her penguin socks sliding across the smooth floor.

"Mina's like a penguin on ice!" she heard Momo say, and then she heard Sana's laughter in response. But Mina ignored them both and turned to Twice's maknae.

"Tzuyu, I'm sorry I didn't wake up early to make you breakfast like I promised! I should have set an alarm," Mina apologized to the towering girl. Tzuyu's family had traveled to Korea for this year's Chuseok, so Tzuyu would be spending the next few days with them.

Tzuyu smiled kindly, clearly unbothered. "It's OK, unnie. I could have woken you up if I wanted your pancakes, but I didn't have the heart to do it. Sana-unnie didn't mind though. She was like 'I don't care, I'm waking Mina up right now!'"

"Yah, it wasn't like that!" Sana complained, instantly objecting to Tzuyu's version of events. "I wanted to make sure she didn't miss you leaving!"

Sana and Tzuyu glared at each other playfully. And then Sana turned and winked at Mina. Outwardly Mina laughed with the others while inwardly her heart skipped a beat.

To hide the blush that was surely forming on her cheeks, Mina reached out and gave Tzuyu a hug. She could feel Sana watching her and so she glanced back and caught Sana smiling at them with a softness and wistfulness that she couldn't quite decipher. Mina met Sana's warm eyes for just a moment, finally catching the subtle note of sorrow in her gaze.

"What was that?" Mina wondered, surprised by Sana's uncharacteristic expression. Was Sana just sad to see Tzuyu leave? But a moment later, Sana looked away from Mina and returned to being her bubbly and cheerful self again. Sana bounced over to Tzuyu, giving their youngest a big hug and kiss. Together with Momo, they sent Tzuyu off on the three day Chuseok break with a smile.

"But what was that look?" Mina wondered, glancing over at Sana who was bickering and playing with Momo per usual. Although it was rare, Mina's heart ached at the sight of Sana feeling sad. But the subtle touch of sadness was gone now. Examining Sana's smiling face, Mina wondered if she had misread Sana's expression.

"Mina-ya," Sana said, disrupting the pensive girl's thoughts. Sana turned back with an outstretched hand beckoning to Mina. "Come on. Let's go make breakfast for the others."

Mina could feel her chest swell at the sight of Sana's genuine smile. Perhaps she had really imagined that look of sadness in Sana's expression after all. She reached out and linked hands with Sana, letting their warm fingers intertwine comfortably. Mina wondered if Sana could feel her heartbeat racing t