Ayumu, Haruna, Eucliwood and Seraphim go to an indoor swimming pool where they also run into Yuki, Taeko and Kanami. Seraphim is shocked to find her fellow vampire ninja, Sarasvati (under the alias Kirara Hoshikawa), performing as a net idol. She somehow finds herself in a popularity contest against her, which Haruna decides to enter as well. Dai-sensei brings out a device that allows Eucliwood to temporarily swap her magical ability with Ayumu, allowing her to sing as well. The machine breaks down mid-performance, but Haruna uses some of her magic to let Eucliwood keep singing. However, Ayumu, still with Eucliwood's magic, speaks his mind and accidentally puts all the girls in skimpy bikinis, leading to a swift punishment.