V (The Visitors).Nagasumi runs into pop-star idol Lunar Edomae who has considered herself Sun's rival since they were children. Lunar's mermaid form is revealed to him during a rainstorm so of course Nagasumi is sentenced to death again. However when Sun admits she had completely forgotten about Lunar, and that Nagasumi is her fiancé, Lunar jealously declares her intention to steal Nagasumi and make him her slave. She also insists on moving into Nagasumi's house and transferring schools to be in Nagasumi and Sun's class. As a celebrity Lunar immediately gains numerous loyal fans among the male students but is further enraged upon realising Sun already has more fans than she does. As the day progresses the Sun Faction and Lunar Faction grow larger and more hostile to each other until eventually the entire school is embroiled in a Sun vs Lunar war.