While Takuruu is taking a bath, he thinks of Momoko being Wedding Peach and how will he hide it from Igunisu. Someone calls him and accuses him of hiding something from Igunisu. Takuruu denies it and asks her to reveal herself. From the water, Potamosu comes out and Takuruu is stunned to see her.
It is the day before Halloween. Momoko and others are walking around and observing the different decorations. Yuri suggests that they have a Halloween party at Reiko's school though Hinagiku and Jamapi are not very thrilled because of their past experiences with the children. Yuri and Momoko decide to invite Kazuya to help which makes Hinagiku wanted to join them. They decide what to wear and Hinagiku escapes to a phone booth to tell Kazuya what to wear so that they will be a pair but Yuri and Momoko caught her. Meanwhile, Takuruu is watching Igunisu and Potamosu agruing about letting Potamosu stay with him, - - an idea that Igunisu does not like. Then, they started chasing each other, going in and out of Takuruu's body that he gets angry and expels the two from his body. Igunisu then decides to let Potamosu stay to help him destroy the Love Angels much to Takuruu's dismay.
Takuruu and Potamosu goes out together as Potamosu is curious about the human world. She wonders about the different costumes that people are wearing and Takuruu explains that it is Halloween. Potamosu runs off and imitates some punk, wondering if it is suppose to be scary. Takuruu finds her and tries to go away since he sees Momoko and others approaching them but Potamosu does not want to. Hinagiku asks who she is and Takuruu says that she is his cousin. The three girls then invite Potamosu to their Halloween Party. Yuri gets some cloths from her mother for their costumes as Takuruu and Potamosu spies on her. Potamosu is still wondering what is it to be scary but Takuruu drags her away. Taking a bath again, Takuruu is wondering about the events when Potamosu appears and asking him which costume is nice as she keeps on chaning to different outfits.
The next day, Reiko teaches the childen how to trick-or-treat as Momoko and others wear their costumes. Then, they start to give treats/candies to the children. Takuruu and Potamosu is watching them from an aquarium. Potamosu decides to show them what she calls scary and goes into the aquarium. Takuruu panics and asks Igunisu to call her back. Igunisu tells him that Potamosu is just curious abot the human world. Takuruu hen asks for Igunisu's power to help Potamosu. Igunisu agrees. Potamosu arrives and tells the children what is being scary but the children just wants their candies from her and starts harassing her. Potamosu panics and hates the feeling of love so she grabs a child who cries in fright. Jamapi tells them that she is one of their enemies.
Takuruu arrives with a small bottle which Igunisu gave him to change his form. As the Momoko and others try to rescue the child, Wedding Peach appears. It is actually Takuruu dressed up as Wedding Peach! He lures Potamosu away as the three girls decide to help the impostor. Takuruu as Wedding Peach is easily defeated by Potamosu and Potamosu realizes that it is Takuruu. Then, the real Love Angels arrive. Potamosu attacks them with water sprouting from the ground. They used their Something Four to defeat her but Potamosu escapes. Wedding Peach goes to Takuruu and he calls her Momoko. Momoko realizes that Takuruu pretends to be Wedding Peach because he wants to protect her. Hinagiku also realizes this and thanks the unconscious Takuruu. Yuri comments on how funny he looked as Wedding Peach and they laugh.
Takuruu is looking at Momoko's picture from the computer then Potamosu appears from his aquarium. Potamosu warns Takuruu not to pretend as Wedding Peach again but Takuruu is able to change the subject to Igunisu by saying that they make a great pair which makes Potamosu happy.