You cannot redo a heart event once you mess it up and saved your game which I'm assuming you did, but messing up a heart event does not ruin your chances with any one (as in you will still be able to marry them once you've met the requirements for marriage) you just lose Affection Points and possibly Friendship Points.
Nina dies :(
go in your house after 6 on that day and you see an event
The grape harvest that makes some of the finest wine in the world.
Her blue heart event happens when you walk into Dr.Hardy's house on a rainy day from 6:00a.m. - 12:00p.m.
yes. Many other chances, my friend.
A heart event in all harvest moon is a signal on how much a girl likes you
Black heart event.
you'll get beaten up by flora your get at least 15 fatigue and/or faint outright
Probability is the mathematical chance that an event will occur.
It is called probability that an event might happen on a scale from 0 to 1
Probability of success is a mathematical chance that an event will occur.
there is no green heart event.