No wonder she felt that he could have been the man behind the mysterious number. When she confronted him about it, she had been cruelly rejected, with the excuse that it was nothing more than he felt he owed her, but now, from the looks of things, he might have been lying at the time.
If it was simply because he felt like he owed her, did he need to abandon so much of his professional work to follow her to Japan?
If it was simply because he felt like he owed her, did he need to continue helping her secretly investigate Song Cheng's death using so much of his finances and resources even though he had already cut all ties from her?
If it was simply because he felt like he owed her, when she was trapped in the northern mountains, did he need to pretend like he was near her when in fact he was speeding through town to come fetch her?
If it was simply because he felt like he owed her… all the memories floated up in Song Qingchun's mind.