How can you get a blue feather in harvest moon magical melody?

Well first of all you have to have 8 or more hearts with the person but to fully marry them you have to upgrade your house to level 3 then you need to buy a double bed from woody AND have 30 notes. Once you have thirty notes Theodore will come to your house then he will give you the blue feather.!.!

Hint: to get level 3 house befriend either Joe, Kurt or woody to one heart. Woody will only let you buy a double bed once you have upgraded your house to lvl 3. ( Give Woody branches)