Momoko, Yuri and Hinagiku are in a train ride to go to a hot spring because they want to keep an eye on Kazuya who is going there with the soccer team. Hinagiku teases Momoko being with Yousuke. Momoko is uneasy since Yousuke is with Hiromi in the other coach. She denies that she is jealous. Meanwhile, Hiromi keeps on pestering Yousuke then sees from the window, lots of red flowers surrounding the lake. Hiromi asks what kind of flowers those are. Kazuya tells her that they are Salvia and they like hot places so they thrive near the hot spring.
Yuri and Hinagiku go to their coach to greet the soccer team. Hinagiku whispers to Yousuke that Momoko is here. Yousuke blushes. When they return, Momoko tells them that she wants to go home but Yuri and Hinagiku dissuade her since the tickets for the trip are very expensive. Momoko exposes their plan that they just want to follow Kazuya. Hinagiku and Yuri deny it and tell Momoko that they are doing it for her to be with Yousuke. Momoko threaten to go home alone but the train has arrived in their destination so she cannot back out anymore.
In Onsen station, Yousuke goes to Momoko to greet her. They learn that they are staying at the same hotel. Yousuke flirts that they should take a dip in the hot spring together. Momoko keeps on blushing. Hiromi comes and grabs Yousuke saying they are going to practice. Yuri and Hinagiku notice that Momoko has cheered up. Later, the three girls go to watch the soccer team practice. Then, they go into the hot spring where Jamapi gets dizzy since it is so hot. When the three decide to leave, the soccer team run into the hot spring. The three girls immediately hide behind the rocks. Kazuya tells the soccer team about their schedule as the three girls are all dazed for staying too long in the hot spring.
That night, the three girls are laying down since they are not feeling well but when they hear the soccer team are going to a fair, they immediately get ready as Jamapi wonders what is with their sudden change of attitude. Kazuya and Yousuke are playing hoops wherein if the hoop falls on the doll, it is yours. Yuri and Hinagiku ask Kazuya to teach them. Yousuke then notices Momoko and asks her if she wants to learn, too. Momoko nods but Yousuke is grabbed by Hiromi who leads him to a shooting gallery. Yousuke hits some as Hiromi praises him. Momoko then shoots all of the dolls down with many guns so that they will not win any. When she looks at them, they are gone. Yuri and Hinagiku see Momoko trying to look for Yousuke and Hiromi.
Near the lake, Hiromi brings Yousuke to a tree and they are surrounded by Salvia flowers. Hiromi says that it is very romantic here and then positions herself to kiss Yousuke. When Hiromi opens her eyes, she finds Yousuke running away so Hiromi is very angry and swears that Yousuke will pay. As Yousuke walks away, Momoko finds him but Potamosu appears between them. Potamosu tries to grab Yousuke but she bounces off as Yousuke is surrounded by a black aura. Potamosu tries again and succeeds in embracing him. Momoko quickly transforms to Wedding Peach. Yousuke tells Potamosu to get away from him then he is surrounded by a blue glow which is preventing Potamosu from coming near him while Potamosu is surrounded by a red glow. Potamosu wonders about the power between them and that her DNA is moving fast. Yousuke screams in pain and their glowing vanish. Potamosu then prepares to kiss Yousuke who is unconscious.
Wedding Peach shouts for Potamosu to stop. After some fight, Potamosu pins Wedding Peach to a tree with her icicles. Angel Lily and Angel Daisy come to help Wedding Peach and they fight using their Something Four. Potamosu summons Tamota [a chick in an egg] which attacks them with explosions. The Salvia flowers around the lake glows and all of them are surprised. The crown which is one of the Something Four comes out of the lake and a red-haired girl wearing it appears. She tells them that she is Angel Salvia, the fourth Love Angel. The three Love Angels are very happy that they have found a new member. Wedding Peach says that they should toast to celebrate but Angel Salvia says that it is childish. Angel Salvia threatens Potamosu who orders Tamota to attack Angel Salvia.
Angel Salvia uses her sword and starts slicing the egg bombs. Then, she attacks Potamosu. Momoko tells her to stop because Potamosu would get hurt with Angel Salvia's sword. Potamosu escapes so Angel Salvia focuses on Tamota and starts attacking it. Momoko intervenes telling her that they do not kill their enemies. Tamota transform to a firey bird and attacks them. Wedding Peach fights it and sends it to happy land. Wedding Peach goes to Yousuke and is relieved that he is fine. Salvia tells them that she does not believe that these evil beings/their enemies can change then, she left.
Limone comes and tells them that they are now four who will fight against their enemies. Potamosu reports to Reine Devila about the fourth Love Angel and that she will try to get the fourth Something Four. Back at the hot spring, Kazuya and Yousuke are taking a dip and talk about girls then Yousuke comments that girls are very hard to understand. Looking out of the window, the three girls say that they should put aside Kazuya and focus on their enemies since there are now four of them. Jamapi comments that he cannot understand girls since they kept changing their minds.