Well the way I saw it was even though her memories were wiped she still has that basic instinct. The instinct that brought her to the caves as well s leads her to fell so close to Kenji. And that on top of the few memories she has gotten back I would suspect the world love would be tied in somewhere(whether it be her instinct and familiar feeling to call it love or maybe even hearing the words 'I love you' in the memories she had.