Upon arriving at their accommodation, the girls meet Chiharu Okiyama, the twin sister of the lifeguard from earlier, Koharu. While trying to hide Saki from the neighbors in the hot springs, they inadvertently discover a wishing rock in the hot spring that causes Saki to turn invisible, unable to be seen or heard by the others. Later that night, as Natsumi talks with Yuka and Rinko about her desire to stop Saki from moving, they remind her that they'll still be friends regardless...