The first event is triggered when you walk out of your farm some time during the afternoon. He is talking with Nami and they have a scene together. The second scene is when you go to Gustafa's yurt the next day at specifically 10:00. He will be walking back and forth inside his yurt. He will then notice you and says something like "Would you like to talk with me for a while?" say yes and the screen will turn black and then it comes back to picture when your done. The third scene is when you walk out of your farm sometime between 7:00-8:00. Gustafa will be sitting on the ground playing his guitar he will ask if you want to listen to a song. say yes and he will play part of his love song for you. This scene happens in the fall go out of your hose sometime in the morning and Gustafa will be there. He will ask you if you would join him for a walk. Say yes and you will be walking towards the waterfall. He will then ask would you like to hear my song. Say yes. There are more scenes during the fall so don't propose until winter 9th or 10th.