Reviews for Fundamentals of a relationship
Reca chapter 1 . 4/1
I love It. I miss this ship so much, I'm so glad to see works about It as good as this one!
DarkMind666 chapter 1 . 4/1
This is so good, I love this pairing and this story!
thesunsets chapter 1 . 2/17
So a few things about this:

Good gosh, it looks like Billy finally grew a few brain cells as he got older. He still acts childlike, though, which fits him.

I like the addition of Sir Raven - a good little inlore gag. Grim, Billy, and Mandy were all kept in character, as well.

Your grammar and structure have come a long way. I'm proud of you.
Phantom Dark-Knight chapter 1 . 1/4
Finally, some good Billy x Mandy stories
Zoryan El Muerto chapter 1 . 12/9/2019
Huh, nice story. Keeping them in character, even as high school lovers. Like Grim said, they’re a match made in hades.