Episode 10

Beavers vs Mother Ichijo is the tenth episode of the first season of the anime.

Synopsis
Framed as murderers by Reiko, Migi and Dali find themselves unable to reveal themselves and decide to seek help from Akiyama.

Plot Summary
Police interrogate Mr. and Mrs. Sonoyama about the bloodied knife that they found underneath their son's bed. Migi and Dali observe this feeling certain that Mrs. Ichijo has framed them for Micchan's murder. They want to expose her as the true murderer though feel they need help, so they enlist Akiyama's help. Akiyama agrees to help Hitori though says that they will need a powerful weapon and leaves.

While Akiyama is away, Migi tries to convince Dali to reveal himself to Akiyama, but Dali remains hidden in the closet. Akiyama returns with Maruta, who screams upon seeing Hitori, identifying him as a murderer. Maruta agrees to help them calling the Ichijo family the devil reincarnated. Akiyama tells Hitori that Maruta has the technology they will need to help them succeed. Hitori and Akiyama agree to Maruta's demands by calling themselves beavers and calling him Lord Maruta.

Maruta uses his drone to attempt to send Karen Ichijo a note to her bedroom window, feeling certain she will help them. Maruta is spooked by a raccoon, and his drone crashes. Determined to contact Karen, he climbs up a lamp post and uses his hat to signal to Karen in morse code. She responds to him using morse code by turning on and off her bedroom light.

They go to Maruta's house to plan further. Akiyama says that they will need one more person to help pull off their plan, and so Dali presents himself. Both Akiyama and Maruta have trouble accepting that the twins are two different people, but the twins explain why they have been living as they have been. The four agree to a plan to become the Birds.

They initiate the plan with Akiyama dressing in his bird costume to distract the detectives who are looking for Hitori. Maruta and the twins climb a tree with the intention of accessing the Ichijo home through Karen's window. Maruta uses a slingshot to get a ball of yarn to her room, tying the yarn to the branch of a tree. The three crawl along the rope observing that below them, the ground is covered in razor wire. Maruta panics at the sight of this, but Migi pushes him forward to get to Karen's room before the branch that is holding their rope breaks. Dali, who was last to cross, tells Migi that he will not make it, but Migi ties himself to the other end of the rope to balance their weight so that neither falls. They crawl up to Karen's room and find a romance happening between Maruta and Karen.

Karen explains that she always knew there was something off about her family. Micchan was the one to make her remember about her biological mother. Karen explains that Mrs. Ichijo wants everything to be perfect, and that she favors Eiji because he looks like Mr. Ichijo. Karen does not think she will be a sufficient hostage since Mrs. Ichijo favors Eiji so much more than her. She tells them that Eiji is currently being re-educated in the hidden room where Migi had previously been re-educated.

Karen provides a distraction by crying for her father because of a stomach ache, which allows Dali, Migi, and Maruta to go downstairs to the room where Eiji is being held. They find Eiji acting as a baby, drooling and wearing a diaper. He screams out of fear but the twins made funny faces to turn his screams into laughter. They make a plan to bring Eiji upstairs and hold him hostage while Maruta distracts Mrs. Ichijo to bring her downstair so that she will be less of a threat in a lower position.

As they begin to enact their plan, the twins fear that Maruta has failed them, but he proves himself to them and provides the video camera to film her confession. Upon finding that the twins have Eiji as a hostage, she says that they are truly Metry's children. She sits down and agrees to tell them the story of Metry, meaning that she will tell them a story about the devil.

Characters

 * Youko Sonoyama
 * Osamu Sonoyama
 * Dali
 * Migi
 * Shunpei Akiyama
 * Maruta Tsutsumi
 * Karen Ichijo
 * Akira Ichijo
 * Reiko Ichijo
 * Eiji Ichijo
 * Micchan flashback