Well, initially, Ginny might be a bit intimidated by Harry being her Dada professor. But as he encourages her in class and gives her challenging tasks, she rises to the occasion. This makes Harry see her as a strong and capable witch. As for Ginny, she begins to trust Harry more. They might start having private conversations about magic and life outside of class. Slowly, their relationship could evolve from a formal one to a more personal and affectionate one.
In this fanfiction setting, Harry as the Dada professor would be in a position of authority. However, Ginny's fiery spirit might catch his attention. He could start giving her special assignments related to her interests in the Dark Arts. As they work on these together, they would share their thoughts and experiences. Ginny would show her vulnerability to Harry, and Harry would show his trust in her. This back - and - forth would lead to a deeper bond, and they might even fall in love as they discover more about each other during Ginny's 7th year.