From chapter 1 to 140 it's more of an R-15, after that, things level up a bit so it's more of an R-18. Although without getting to sexual intercourse, for that you would probably still have to wait a bit.
Hello, I just wanted to let you know ALL there chapters I have read so far have [edited] in the title and there are many errors. For instance some words aren't correct and it's a consistent mistake (e.g., "whit" instead of "with"). I know no one is perfect. However, I thought it may be beneficial to you to have your chapters re-edited. I'm on chapter 15 so far. Overall, I like your story and believe it has potential.