On that night when Naoki left home, he kissed Kotoko for the second time. However, there was no passion in this kiss which left Kotoko to feel that the kiss felt as cold as ice. Even though she is very much in love with Naoki, the kiss gave her anything but happiness. When she reached home, Kotoko stared blankly at Naoki's photo in her wallet. She felt so excited just looking at Naoki's photo. Why didn't she feel the same when Naoki kissed her?
Naoki has a dream about his family knowing about his kiss with Kotoko. When he sees Kotoko's smug look and his family's joy upon knowing this, Naoki grimaces in his sleep. Then, he sees Yuki asking Naoki why he hasn't been playing with him. Yuki tells Naoki that he likes Kotoko more than him and leaves Naoki breaking out in cold sweat. He then finds his parents telling him that they will be building an extension for Naoki and Kotoko as a wedding present. Naoki asks Kotoko what is going on. Kotoko appears in a wedding gown and tells Naoki that he has to marry her since he kissed her last night. Naoki tries to escape from Kotoko when he finally wakes up from the nightmare.
At the breakfast table, Kotoko and Naoki look at each other with a weird expression. Naoki seems to have something on his mind but his parents and Shige keep on talking among themselves. Naoki finally tells them that he wants to move out and live alone. This shocks everyone but Naoki keeps mum about his reasons for doing so. To stop them from questioning further, Naoki leaves for school hurriedly and Kotoko chases after him.
Kotoko asks Naoki why he wants to move out suddenly and whether this has to do with what happened last night. However, Naoki says that his decision has nothing to do with Kotoko and tells her not to overestimate herself.
In school, Kotoko tells Junko and Satomi about the kiss which proved to be a disappointing experience. Junko relates her own experience to them. Once, she and her date had just eaten grilled eel and they kissed but Junko got the spinach that was stuck between the guy's teeth in her mouth. Satomi then says that in the midst of her kiss, the guy ran away by saying that he had to relieve himself urgently. However, Kotoko tells them that she is not referring to disgusting kisses but those kisses which are very "cold". Kotoko says that a kiss should be warm and sizzling so she cannot comprehend why her kiss was so cold. Junko and Satomi get into a frenzy and immediately guess that Kotoko has kissed Naoki. Kin-chan gets so uptight about this when Junko asks him if he has kissed before. In an attempt to save his own reputation, Kin-chan lies that he has kissed before but blurts out the fact that the person was a guy. Kin-chan tells them a kiss without feeling is not considered to be a real kiss and Kotoko should accept this type of kiss. This leaves Kotoko to think hard.
Kin-chan rushes into the 'A' class and demands Naoki to apologise to Kotoko. Kotoko runs in and tries to stop Kin-chan from saying anything more. Kin-chan says that Kotoko is the real victim when Naoki forced Kotoko to accept his kiss. Reiko refuses to believe it and says that it should be an accident. Kotoko tells Kin-chan to forget about this thing and that the kiss without feeling isn't considered to be a real kiss. Naoki looks up when Kotoko says that. Kin-chan is touched by Kotoko's words and says that he will give Kotoko a fiery kiss. Kotoko tries to fend off Kin-chan advances when Izumi-sensei ('A' class form teacher) comes in and sends them to the teachers' room. Reiko stares at Naoki when she realises that what Kotoko has said is true.
Izumi-sensei scolds Kin-chan and Kotoko in front of Kanhara-sensei (the 'F' class form teacher). The latter tries to defend them by saying that Kin-chan and Kotoko are just using a more liberal way of expressing friendship. When Izumi-sensei asks Kotoko if she did kiss Naoki, Kotoko is speechless. Izumi-sensei keeps on questioning Kotoko and cannot believe that Naoki kissed her (she seems to be quite fond of Naoki). Izumi-sensei then gets into a big quarrel with Kanhara-sensei.
Junko, Satomi and Kotoko go to have a bite at the fast-food restaurant when they talk about Kotoko being abnormal to feel nothing when Naoki kissed her. Satomi adds on by saying that Kotoko could have liked the feeling of being in love instead of loving Naoki. Kotoko doesn't think that this is possible and is sure that she loves Naoki a lot.
Naoki's parents ask Naoki why he wants to move out but Naoki remains silent. Yuki then says that Kotoko must have done something to make Naoki move out. However, Naoki defends Kotoko by saying that his decision has nothing to do with her. His parents refuse to let Naoki move out because he is still in senior high school but Naoki tries to evade the topic. Yuki scolds Kotoko for being a troublemaker.
Naoki goes up to his room but he cannot concentrate on doing anything. Yuki asks him if he is bent on moving out but Naoki ignores Yuki.
Naoki's parents discuss Naoki's matter with Shige and he feels that Kotoko could have been the cause of it. Machiko suddenly says that Naoki's strange behaviour could be due to him falling in love. According to her, people in love are always at a loss about what to do and often does things beyond their normal self. She even thinks that Naoki has fallen for Kotoko but Shige begs to differ since they are so different in terms of personality and studies. Machiko insists that Naoki and Kotoko are the most compatible in Japan. Shige seems to sense that something is wrong with Naoki's father.
Kotoko is baking a cake with Machiko's cake while the guys are all relaxing. Suddenly, the doorbell rings and Naoki answers it to find Reiko calling on him. Machiko doesn't like Reiko at first sight but Naoki's father keeps singing her praises. Machiko delibrately says that clever girls may not be cute in order to put Reiko off. Reiko says that she will be studying in the same university as Naoki but Machiko tells her not to give Naoki too much pressure by following him everywhere. When Reiko brings out the cake that she has baked, Yuki and his dad are won over but Machiko still stands by Kotoko. However, Kotoko's burnt cake is no match for Reiko's beautiful one. Shige tries to build up Kotoko's confidence by lying that her cake is delicious but when Kotoko tries it herself, she knows that she has lost to Reiko. Suddenly, Reiko mentions the fact that Naoki has kissed Kotoko before and this shocks everyone. Machiko's reaction makes Naoki remember the 'nightmare' he had which fully coincides with what happened.
However, Reiko says that she is worried for Naoki as Kotoko's
presence in the Irie family has created many rumours in school.
Machiko tells Reiko not to worry since their relationship is
approved of but Reiko says that the rumours will affect Naoki
when the exams come. Naoki gets irritated at Reiko but she asks
to speak with him privately. Kotoko is upset by this but Machiko
tells her that she should not lose to Reiko.Reiko asks Naoki if he intends to let Kotoko stay on but Naoki says that Kotoko's presence is not a problem to him. Reiko tells Naoki to kiss her when Machiko barges in to spoil things for her. Reiko is embarrassed by this.
Yuki asks Naoki if he did kiss Kotoko but Naoki tells him to keep out of his affairs. Yuki is upset by Naoki's reaction.
Shige tells Machiko that she should not force Naoki to accept Kotoko but Machiko says that she has felt all along that they are made for each other. Kotoko feels a bit upset when she hears that.
Reiko tells Naoki to express thanks to his father for entertaining her when Watanabe overhears it. He asks Naoki if he likes Reiko but Naoki doesn't answer. He then remarks that Watanabe has become so serious like the 'F' class. Watanabe doesn't get Naoki's meaning.
Naoki's father says that he won't object to Naoki moving out. To his surprise,Machiko agrees to it because she feels that absence will make the heart grow fonder and this will be a test for Naoki and Kotoko. Upon seeing Naoki, they stop their discussion and go back to their rooms.
Kotoko is in her room staring at Naoki's photo when Machiko rushes in and says that something is wrong with Yuki. The doctor comes and says that Yuki is suffering from stress disorders. He shows them the balding part of Yuki's scalp. Kotoko feels that she is the one giving Yuki stress.
Kotoko discusses with Shige that they should move out soon. Shige tells Kotoko that she can still like Naoki but she should never be a burden to him. Kotoko promises to become a woman who men will like but is unsure at this stage whether she likes Naoki. However, she tells Shige that when they move out of the Irie residence, she will know the answer to that.
Yuki refuses to eat anything and still stares into blank space. Kotoko brings him some comics but Yuki throws them out of his room. Kotoko is upset by this.
Naoki sees that Yuki is still throwing tantrums but Yuki says that Naoki should leave him alone since he means nothing to Naoki. Naoki ignores Yuki at his words.
Kotoko brings a lunchbox for Yuki but Yuki doesn't reply to her knocking. Just then, Naoki comes upstairs and Kotoko asks Naoki to bring the lunchbox to Yuki. However, Naoki tells Kotoko not to bother about Yuki because he has become a spoilt brat. Kotoko is shocked by Naoki's reaction.
Kotoko goes to Yuki's school and asks his classmates to visit Yuki. However, they refuse to go and even insult Kin-chan and Kotoko. They then approach two girls and ask them to write their well-wishes on a cardboard for Yuki. Kin-chan wants to reward their kindness with some sweets but the girls refuse, saying that Kin-chan is a weird uncle. The teacher in the school spots them and takes them as tricksters who want to abduct the kids.
This matter gets to the school and the headmaster warns them that if another thing happens again, both Kotoko and Kin-chan will be expelled. Kotoko apologises to Kin-chan about this but Kin-chan says that for the sake of Kotoko, he wouldn't mind. When they meet Naoki and Watanabe along the corridor, Watanabe insults them but Kin-chan defends Kotoko who is running around for the sake of Yuki. Naoki scolds Kotoko for being a busybody and wants her to stop making trouble. Suprisingly, Kotoko rebukes Naoki for not caring about Yuki and praises Kin-chan for helping her.
Kotoko goes to Yuki's classmates' houses to get them to write down their well-wishes for Yuki. She is striving hard for the sake of Yuki. When she manages to get everyone to write on the cardboard, Kotoko feels so proud of herself.
Kotoko slips the cardboard into Yuki's room and Yuki is touched by her gesture. When Naoki sees the cardboard, he scolds Kotoko for being such a fool to do such things. Suprisingly, Yuki stands up for Kotoko and scolds Naoki for being inferior to Kotoko. He even tells Naoki that he can move out if he wants to. Naoki goes out in anger.
When Naoki goes downstairs, he sees his parents talking to Kotoko and Shige about Naoki's moving out. His father agrees to let Naoki move out for the sake of learning to be independent. Kotoko insists that if she moves out with Shige, Naoki will not have to move out. However, Naoki's parents will not hear of it and wants them to stay. Naoki is shocked to find that what happens coincides with his dream again. Naoki shouts at his parents and tells them to forget about manipulating him. Kotoko tries to explain but Naoki rushes out of the house. When his parents try to stop him, Naoki tells them to stop bothering him. Kotoko gives Naoki a tight slap and shocks everyone. Kotoko tells Naoki that he should understand his parents' well intention before flaring up.
Naoki runs out of the house while Kotoko chases after him. Kotoko had thought all along that Naoki was only pretending to be cool but he had a warm and caring heart. However, Kotoko has realised that Naoki's heart is so cold that he is too selfish to love anybody who showers affection on him. Naoki scolds Kotoko for disrupting his life ever since she came into the Irie family and wishes that she didn't exist. Kotoko thanks Naoki for speaking the truth to her even though she is hurt by his words. Kotoko then kisses Naoki and says that this is a kiss filled with happiness and warmth before going home.
Kotoko and Shige pack up to leave even though Naoki's parents try to stop them. Kotoko thanks Machiko for the beautiful memories and says that she will never forget her days in the Irie residence. Naoki's parents are very upset while Yuki rushes out from his room but is unable to bid Kotoko goodbye.
Naoki is roaming the streets while Kotoko and Shige are singing happily as they make their way to Shige's restaurant.
Yuki writes in his diary that with Kotoko's absence, he will be able to recover from his illness.However, he feels bad about treating Kotoko badly when she was around.
Kotoko lies in her bed, unable to sleep. She gets Naoki's photo out and stares at it for a long time.
When Naoki gets home, he says sorry to the asleep Yuki. In actual fact, Yuki is just pretending to be asleep and he has heard what Naoki said. Naoki has a look of loss and frustration on his face...