One of the most beautiful traditions in Harvest Moon is the Harvest Goddess Dance, usually performed by all the Girls for the Bachelors of the village. In Sunshine Islands, it is performed at the Meadow on the occasion of the Harvest Goddess Festival on 8 Spring to mark the Birthday of the Harvest Goddess. Shea is the only Bachelor who does not attend, although you will have the option to invite only a Bachelor at Green Heart or higher. The other Bachelors will be paired with your 'Rivals' for the Dance.
Rather coincidentally, Shea reached Green Heart on the day before the Harvest Goddess Festival. I therefore experienced his Green Heart Event as I prepared to ask the Bachelor of my dreams to accompany me to the Dance. His Green Heart Event actually includes a little dance. I therefore combined the Harvest Goddess Festival with Shea's Green Heart Event in this video: