I dunno what's ending is better between keen or princess? I need to find the best endings ever!

My favorite ending is keen, ending wise I like happiness.

what's the difference between keen and princess (princess is so far the best treat here grate) 

For keen, you need to balance affection and discipline. My method is being more rough in the ranking up scenes but nicer in the gaining XP parts, it took me a few tries though, good luck!