Asami Kuho, the girl who was pushed down the escalator, is questioned by a woman named Natsume, who then fires a red ball at her head, causing her to remember nothing about the incident. Kamba hears that his uncle is planning to sell their house and goes to see a strange person to obtain the money to buy it. Meanwhile, Shōma and Himari find Ringo, who had a bad day, and invite her back to their place. There, Shōma asks Ringo about her diary, which she claims is a Diary of Fate which describes her future. Both she and Shōma are summoned by the Penguin Hat, who orders Shōma to retrieve the diary, but Ringo breaks free and throws away the hat which lands on a truck, causing Himari to fall dead again. As Kamba goes to retrieve the hat, he recalls what happened 9 years ago when he went with his father into a typhoon when Himari was ill with a fever. After a tough struggle, Kamba manages to retrieve the hat and return it to Himari.

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.

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.