'Can you reply?' that is what Yujin said when her project partner won't cooperate with her. She disliked the idea of approaching people but it wasn't the case when she got paired to work with Shin, the guy who couldn't care less.
'Can you notice?' Ryuki says to herself, when she started admiring the quiet kid, Kiro. Even if she knew they were the complete opposite, she managed to took the shot by messaging him everyday.