Natsu no Tropical Musume. (夏のトロピカル娘。; Summer's Tropical Girl.) is an indies single by THE Possible featuring Hashimoto Aina and Akiyama Yurika. It was released on June 13, 2007 alongside "Kingyo Sukui to Hanabi Taikai". Both singles feature two different members for the A-side, and the full group for the B-side. The Single V was released on July 11, 2007, also on the same day as "Kingyo Sukui to Hanabi Taikai".