Rain is an extensive webcomic by Jocelyn Samara (at DeviantArt). As I write this note, it is at 372 pages, with 15 complete chapters (or story arcs), and chapter 16 in progress.

The comic tells about the life of the title character Rain, as she navigates her senior year of high school. Rain is an M-to-F TS, living full time as a girl. The art style is simple, and heavily influenced Anime, it isn't what I'd call professional, but it's consistent and more than good enough to convey the story. The story is very in-depth, exploring lots of aspects of what it means to be transgendered, as well as looking at different aspects of sexuality. I recommend it because I think the writing is quite good.