Since Midnight Sun is written from the perspective of Edward Cullen, Twilight becomes something quite different than what was originally written. At its heart, Twilight was a unique spin on the teen romance that explores feeling uncomfortable and a fish-out-of-water in high school. In Edward’s case, yes he feels different from his peers, but one would imagine the story is more about a hardened vampire who is just going through the motions, until Bella complicates his life.
Article source: https://www.cinemablend.com/news/2496239/midnight-sun-what-to-know-about-the-twilight-spinoff-and-what-it-could-mean-for-a-future-movie