Mujintou Survivors

Everyone has been looking to the school boat trip, including Aina and her best friend Ikuya. However, the boat gets in an accident, and the two end up washing ashore on a remote island. Aina is happy to see the protagonist is fine, and the two decide to wait for help. While exploring the island, they meet four other guys who've washed up. 1 woman. 5 men. Aina has a bad feeling about this situation...