Since some moment ago, Hiro had been feeling an unsettling feeling rising within his heart. However the feeling was so vague that he wasn't even able to tell the reason behind him having such feelings.
But now as he heard Shun's statement, something clicked inside him. It was like as if the layer of fog which was clouding his mind had suddenly got lifted up.
As he figured out the reason behind his unsettling feelings, unwittingly Hiro then blurted out, "So that's it..."
It was so random that Shun who was walking beside him was startled by Hiro's voice. For a split second he felt like he had fallen from a cliff. He then immediately jolted his eyes towards Hiro, looking somewhat disturbed, "What??"