Thank you sooo so much for your feedback!! There are 8 variations plus the base Fren c:
A Fren dies when he's at zero happiness for over a minute (you can increase the stat by either petting him once or by playing a game perfectly). Another way he could die would be the 'good ending' (when you max his exp 3 times), which is by far the saddest scene I've ever had to draw :((
Thank you again for playing <3