Everything you need to understand or teach One Day by David Nicholls (writer).
"One Day" is a romantic novel by David Nicholls that spans the breadth of twenty years of the lives of Emma Morley and Dexter Mayhew.
Meeting in college, Dexter and Emma have a one-night stand in Edinburgh and spend the day after together. The evening has lasting implications for both of them, as each falls for the other, but neither one, for various reasons, is poised to commit to the other...