You will need to earn 10,000LP with Muffy before her Heart Color will change.
To do that talk to her and give her a gift once per day. Gifts only raise LP once per day so don't bother giving more then one. The more she likes the gift the more LP she will gain.
Also make sure you don't do anything to lower her LP. Littering, answering incorrectly during Heart Events, and letting your animals die will cause her to lose LP for your character.
Are you making sure you are doing these two things? » Blue Bar » 3:00 pm to 5:00 pm ?
Black Heart Purple Heart Blue Heart Green Heart Yellow Heart Orange Heart Red Heart Must view Black, Purple, Blue, and Yellow Heart Events in order
Just go back and activate it. Heart Events must be gotten in order (Black, Purple, Blue, and finally Yellow). If you do not complete the Heart Event you missed you can't do any others. You do not have to lower her Heart Color back down. Even if you have a higher Heart Color than necessary the event will still work.
A heart event in all harvest moon is a signal on how much a girl likes you
» 0 to 9,999 LP = Black Heart » 10,000 to 19,999 = Purple Heart » 20,000 to 29,999 = Blue Heart » 30,000 to 39,999 = Green Heart » 40,000 to 49,999 = Yellow Heart » 50,000 to 59,999 = Orange Heart » 60,000 to 65,535 = Red Heart
I believe she likes flowers, so give her a flower every day.
3pm to 5pm
There is no Orange Heart Event. Muffy only has a Black, Purple, Blue, and Yellow Heart Event.
Give her wine (call up the supermarket on your phone and you can buy for 300g) everyday and her heart will go up quite quickly.
She comes to your house and asks you if you want to go for a walk with her. So really she asks you on a date. oyu go to the harvest goddes ppond first and then to the beach and Kai gives you guys food. for more information visit http://www.fogu.com/hm6/chan3/muffy.php?p= (this page is muffys page it has other stuff to) It tells you about lots of harvest moon ds stuff
Are you making sure you are doing these two things? » Blue Bar » 3:00 pm to 5:00 pm ?
This site helped me to know about everything to do with Harvest Moon DS and DS Cute: http://www.fogu.com/hm6/chan3/muffy.php?p= p.s the ? mark is supposed to be in there it isn't a mistake
That signifies that they are eligible for marriage, give them gifts that they like to change that heart color. The color of the heart tells you how much they love you Black -> Purple -> Blue -> Green -> Yellow -> Orange -> Red
In Harvest Moon DS there isn't an amount of hearts. You tell how much someone likes your character by the color of their heart. To get married the color of their heart must be Red.
Give the person a gift the like everyday. Eventually their Heart Color will change, as long as you don't do anything to lose affection with the person. It takes a long time to get a Red Heart. Each person has different likes and dislikes. The more someone likes the gift you are giving them, the faster their Heart Color will change.
Just do the same things you did to get the other Heart Colors. Talk to the guy and give him a gift once per day. Eventually his Heart Color will change to Orange.
In Harvest Moon DS, Muffy does not have a diary.Muffy and all the other girls only own a diary in Harvest Moon for the Playstation 2. [PS2]If you need to know how Muffy or any other girls feel about you on Harvest Moon DS, when you talk to the girls, there will be a small beating heart by their head when they talk. (Or it might be by their neck, also.)If the heart is black, that means she just wants to be friends.If the heart is purple, that means she is thinkingabout being closer.If the heart is blue, that means she wants to get closer to you.If the heart is yellow, she wishes she were to date you.If the heart is orange, she really wants to date you and will ask you out.If the heart is RED, you are able to marry her.Every girl is different. Celia, Lumina, nor Nami will have the same "definition" for the hearts. Black heart is always the same with all the girls though.HOPE THAT HELPED!