School Swimsuit and Vampire

The students learn that they are to choose a school activity and Tsukune is having a hard time choosing when he comes across the swimming club with Moka who is a bit reluctant to investigate because water has a purifying effect on vampires and drains their powers. As Kurumu and Yukari try to garner the most attention through events, the head of the swim club tries to isolate Tsukune for herself. After she teaches the mermaids the error of their ways, the interior Moka reprimands Tsukune for not understanding the other Moka.