Children of the Storm.After a very awkward moment in Shido's class, where Tohka tries switching genders in an effort to bunk with Shido, the class goes on a field trip to Arubi Island. Throughout the entire trip, Origami and Tohka inadvertently annoy Shido in an effort to win his affections. Meanwhile, DEM Industries and Ellen Mathers as a photographer, begins stalking Tohka on the island. But Ellen has to deal with Ai, Mai and Mii who has a sudden interest in her, as a humorous distraction. Sometime later, Shido and Tohka ran out when a massive hurricane appears out of nowhere. Three trash cans strike Tohka, knocking her out, while two Spirits viciously battle overhead. When Shido tries to intervene, the "Berserk" Spirits Yuzuru and Kaguya, decide their next battle in their long rivalry will be over winning Shido's heart (much to Shido's dismay). When the two girls return with Shido and an unconscious Tohka to his class, Origami seemingly becomes enraged over her new competition. As Tamae tries to arrange for the girls to become students in the class, Kaguya and Yuzuru explain that they were once a single Spirit named Yamai, and that their contests are in an effort to determine whose personality will remain when the two fuse into Yamai once more. Later that day, an incident occurs when the twins make an effort to seduce Shido by switching signs. Things get worse when Tohka shows up along with the rest of the class. Worse of all, Shido is knocked outside the spa into very cold water.