Mawaru-Penguindrum

Shouma tries to dissuade Kanba with no success while Ringo also boards the train, claiming she had learned from the present she got from Himari's friends the secret spell contained into the now lost diary. She activates the spell determined to sacrifice herself to save Himari and the others, but Shouma takes the burden to himself instead while Kanba sacrifices himself to ressurect Himari for good. The terrorist attack is stopped and both Himari and Ringo are found unconsious with no memories about the brothers or everything that happened. The same occurs for Masako whose brother Mario also fully recovers. While hanging with Ringo at her house, Himari finds a message left by Kanba and Shouma and starts crying without knowing the reason why while Shouma and Kanba, in children form, pass in front of her house accompanied by the four penguins.

Ringo stumbles on two girls dressed suspiciously standing before the Takakuras' house and finds that they are actually Himari's childhood friends Hibari and Hikari from the Double-H idol duo. They ask her to give Himari a present in return for the scarves she knit for them before leaving. Kanba learned from Sanetoshi that his medicine will not work on Himari anymore, and that according to him, she can only be saved after he fulfills his group's objective. Himari tries to dissuade him with no success and discovers that his hideout is situated under the aquarium where she first died. She prays for God to have Kanba saved in exchange for her life and falls lifeless on the ground. Yuri calls Ringo and returns her the half of the diary in her posession and stays beside an unconscious Tabuki at the hospital, who was stabbed by the attacker who was revealed to be Yuri's former lover and co-worker. Masako tries to convince Kanba to give up as the police is already aware of his plans and has a warrant on him, but he moves forward ignoring her pleas until they are surrounded and he puts himself im harm's way to protect her. Injured and unconscious, Kanba is carried away by his comrades while Masako decides to confront the police by herself to cover his escape.

Masako decides to leave the Takakuras alone, still not accepting the 'family' they have. As Himari has another conversation with Sanetoshi, Shouma confesses to Ringo that Himari is not actually his blood sister. Years ago, whilst his parents were organising to change the world with their organization, Shouma met the orphaned Himari whilst exploring his condo. Whilst she is initially passive of him, the two grew a friendship over an abandoned kitten they find, up until it ended up being taken away. When Shouma discovered that Himari had headed over to the 'Child Broiler', where unneeded children go to disappear from the world, he rushed over there to rescue her and chose her to become a part of her family. Back in the present, Kamba continues to converse with his parents about what needs to be done to change the world.

Tabuki reminisces about how he injured his own hands in despair of being relenquished by her mother as she only cared about his younger brother who was a much better pianist than him. After Tabuki traps Ringo at an elevator and holds Himari hostage, he phones Kanba demanding to bring his father to him. Kanba arrives alone to meet them, claiming he has no idea where his father is and finds Himari hung over into a construction bucket. Tabuki does not believe him and Ringo decides to call the police, but Kanba asks her to not do it and she calls Shouma instead. Tabuki reveals that Himari's brother is receiving money from his father's organization to pay for her treatment, and remembering about how Momoka had her hand severely injured to save him, Tabuki starts severing the wires holding the bucket one by one, claiming thet the only way for Kanba to prevent Himari from falling to her death is by sacrificing his own hand to hold the final wire together when it snaps. Kanba does so and despite his pain, he claims he would never have his sister die. Himari than decides to jump by herself to spare Kanba's life, but Tabuki saves her from the fall after seeing in Kanba the same determination to protect his sister he saw in Momoka when she saved him. Shoma arrives soon later and the siblings reunite in tears while Tabuki makes his leave, meeting Yuri on the way who reprimands him. It is also shown that Yuri's showdown with Masako ended in a draw, as each one still holds a half of the diary.

After realizing that she was tricked by Yuri, Masako reminisces about her grandfather, a powerful business tycoon who expelled her father claiming that he was not strong enough to be allowed a place in the Natsume family. After dreaming countless times about having him killed, Masako rejoiced when her grandfather inadvertedly poisoned himself to death by eating ill prepared Fugu. Masako since then assumed control of her family's corporation but was sad that her father had never returned home, until somehow her grandfather's spirit posessed Mario's body and forced her to eat the same poison that killed him to protect her brother, but Sanetoshi appears to save her life. Later, Masako sees Kanba hanging out with the same elusive men who took her father away and Sanetoshi asks Masako to join them in his plan to "put the world back on track" but she promptly refuses.

Yuri, after breaking off an affair with one of her co-stars, feels a longing for a certain someone. Meanwhile, Shoma is ignoring Ringo, feeling she will never be able to forgive him for what his parents did, and tells her they shouldn't see each other again. As Kanba tries to raise more money to pay for Himari's medicine, he is confronted by Natsume, who questions his feelings for Himari. As Ringo becomes depressed over what happened with Shoma, she is picked up by Yuri, who takes her to a hot spring inn and drugs her. It is revealed that she had a thing for Momoka and was the one who stole half of the diary that night, as she decides to act out her sexual desires on Ringo.

Kanba goes home and is called by Sanetoshi claiming that Himari will die once more. Shoma goes into detail of what happened 16 years ago, as Shoma and Kanba's parents were high ranking members of a terrorist organization and were responsible for a terrible incident which killed Momoka. Himari still possessed loses her strength and tells Shoma and Ringo to acquire the Penguin Drum and to stop "them". Himari is then transferred to an hospital and Kanba is called by Shoma. He arrives to find Himari lying dead and tries to once more make a pact to give her his life, but it does not work as she says she must leave to "The Destination of Fate". Just as Himari seems to be truly dead, Sanetoshi appears.

Shoma wakes up in hospital with supposedly minor injuries, keeping quiet about what happened between him and Ringo from his siblings. As Ringo explains what happened to her diary to him, Natsume disguises herself as a nurse and kidnaps Shoma, demanding the other half of the diary from Kanba and Ringo in exchange for his life. Deciding the to leave the diary half with Ringo, Kanba goes to find Shoma, whilst Ringo is told to surrender the diary herself. After luring Kanba into a trap and kissing him, Natsume escapes but is confronted by another person in a penguin hat, whom Natsume identifies as Mario.

Ringo attempts to make a move on Tabuki only to find he is not there as his roof had a leak. The next day, Tabuki tells Shoma that he is moving in with Yuri, which does not settle well with Ringo, who later discovers her father consorting with another family. Undeterred, she visits Tabuki's new apartment whilst Yuri is on tour, using a special cake to drug Tabuki whilst she pretends to be Yuri in order to have sex with him. However, Shoma manages to regain his consciousness and delay Ringo enough before Yuri returns home. As Shoma tries to stop Ringo from taking things any further, her diary is knocked off and is later ripped in half by a passing motorcyclist when she tries to retrieve it. As the shock leads Ringo to walk into the path of an oncoming car, Shoma manages to push her out of the way but is hit himself.

Kamba goes to see Asami only to find she has forgotten all about him. He tries getting some information out of two other girls, but they are attacked by Natsume's red balls, causing them to lose their memories. Meanwhile, Shoma reluctantly follows Ringo's orders in order to let her have her diary, having him move a lot of stuff over to Tabuki's apartment, but she ends up coming down with a fever. It is revealed that Ringo's late sister, Momoka, used to date Tabuki and Ringo felt that, in order to be accepted by her family, she would have to become Momoka by fulfilling what was written in her diary. Despite her fever, Ringo sneaks off to under Tabuki's house to spend her 'first night' with him, whilst Natsume is shown to have her own penguin, discussing 'Project M' with someone.

As Ringo gets help from Himari preparing lunch for a 'date' with Tabuki at the park, Kamba tasks Shōma to go with her and look through her bag for her diary, believing it may be related to the Penguindrum. When they reach the park, they encounter a runaway skunk who runs off after squirting Ringo in stink. After changing clothes, Ringo and Shōma meet up with Tabuki, who brings along the woman Ringo saw him with, an actress named Yuri Tokikago. Come lunchtime, Ringo's prepared lunch gets eaten by crows, leaving her in the shadow of Yuri's picnic. In order to fulfil a 'first kiss' note in her diary, Ringo plans to jump into the pond and have Tabuki save her. However, the skunk appears again and knocks her in, forcing Shōma to save her instead and use CPR on her, though Ringo believes Tabuki to be the one who did it. Later that evening, a girl that Kamba met up with earlier is pushed down the escalator of a train station, completing the description in Ringo's diary.

The Penguin Spirit appears again and tells Shōma and Kamba to board a train and find a girl named Ringo Oginome who may possess the Penguindrum. With Ringo attending a girl's school, Shōma and Kamba send in their penguins to follow her. The brothers end up following her to a lingerie store, where they spot her maneuvering round the outside of a building in order to take a photo of something, which she shows to the brother's teacher, Mr. Tabuki. She then follows him home and hides out under his house, where the brothers conclude that she is a stalker, and pulls out a diary which allegedly fortells destined events.