ItaKiss

Kotoko, from the lowly F-Class, has a crush on Irie, who is the top-ranked student from A-Class. After two years, she collects her courage and confesses to him and tried to give him a confession letter, only to be bluntly turned down. Irie even goes so far as to say he hates stupid girls (meaning her) and doesn't even read her confession letter. When an earthquake strikes Tokyo, her house is the only one damaged. A friend of Kotoko's father jumps at the opportunity to lend a hand, and in a surprising turn of events they end up living at Irie's house.

Yes indeed, it is the renown Irie-kun's house. After some small talk at breakfast Kotoko and Irie are pushed out the door by Irie's mother,and on to school they walk together. But not happily. Irie-kun soon shows how much he doesn't care for Kotoko-chan, or maybe how little he care for human decency. While riding the train Kotoko-chan get's pushed off at the wrong station by the crush of the crowd. When Kotoko frantically tries to get on the train, the doors close and Irie-kun watches as the train slowly pulls away from Kotoko-chan, leaving her with the only options of running to school or being late. When Kotoko-chan confronts him about his rudeness he simply says for her not to talk to him and that he hates absent-minded girls more than stupid ones. After dealing with all of Irie-kun's cold disdain, she decides to one up him in the upcoming exams.

After Kotoko-chan and Irie-kun had gotten just a little closer, she inadvertently brings embarrassment to the one she loves. Now he will never love her. She falls asleep with tear-stains down her cheeks and her confession letter in her hand. When Irie-kun walks into to tell her it's her turn in the shower, he on impulse decides to read the letter, his face is blank, and void of expression. At breakfast the table is full of talk of the Sports Festival. On a whim the family decides to watch as Kotoko-chan and Irie-kun participate especially since they happen to be participation in an event together.

Geez, Irie-kun's mama is really determine! Kotoko-chan and her friends have made plans to go to Waterland and (only thinking about Kotoko and Irie-kun's future) she sends Yuki and Irie to Waterland just to try to get Kotoko and Irie into a romantic sitsuation! Yeah I know, but anyways on their little trip Yuki tries to observe Kotoko at a closer view, so he asks Irie to go get him some icecream. While Irie's out, to get Yuki's icecream, Yuki switches from the part of the pool where he can stand on the floor , to the part of the pool where Kotoko and her friends are.(where he can't stand) Right when he let's go of the ladder he starts to sink because he can't touch the bottom. Right after he become unconsious Kotoko saves him! During that time, Irie over hears these two girls about a little kid who almost drowned! Next, after he heard he hurried off without the icecream to see if Yuki was okay. When he finally gets Kotoko and the others, he realizes that Kotoko took very good care of Yuki, so he just stands there and smiles! Soon after that Kotoko decides to take everyone to the Waterslides and when its her turn to go down she goes. Once she starts going down, she gets a leg cramp, which paralyzes her so she can't move! Once she get to the bottom of the waterslide, Irie notices that she's having a hard time getting out, so he pulls her up and out of the water just in time, and gives her foot a relaxing foot rub!

The final exams starts next week, and the results decide whether or not the F-class students make it into college. After having recieved prior assistance from Naoki with her and her friends' schoolwork, Kotoko is asked - commanded, rather - to get Naoki to tutor the whole of Class F so they can pass their finals.

With Naoki's help, the whole of Class F passes their finals (with the exception of Kinnosuke.) Kotoko tries to give Naoki some homemade chocolate but fails to do so. Later on, Naoki is set to take the entrance exam to Tokyo University. Kotoko sets off to accompany him to the venue; however, the plot twists when Kotoko's health takes a turn for the worse.

Having missed the entrance exams for Tokyo University, Naoki decides to go with the school's escalator system. Graduation day's rolled round and soon after that, the F and A classes bump into each other during their farewell dinners. An exchange of heated words soon ensues where Naoki puts Kotoko down in front of everyone, upsetting her greatly and forcing her to do something drastic - which in turn yields an unexpected outcome.

The first day of college has finally arrived, but Kotoko can't stop thinking about her first kiss with Naoki! What does this mean for their relationship? Just as she thinks she's finally secured a place in Naoki's heart, an obstacle arises in the form of Yuuko Matsumoto, bishie extraordinaire.

Joining the tennis club turns out to be the worst decision of Kotoko's college life. The grueling practices, the painful injuries and the complete feeling of incompetence would be worth it...if only Naoki would show up to practice!! Meanwhile, Kotoko works up the courage to ask Naoki to the latest "couple's movie", but of course Naoki flat out refuses. Kotoko decides to go to the movie anyway but is shocked to see Naoki there with none other than Yuuko Matsumoto!? Can Kotoko really compete with someone so perfectly matched to Naoki?

Kotoko's father has decided that him and Kotoko have overstayed their welcome, and so the time has finally come for Kotoko to leave the Irie's! How will Kotoko manage? Has she lost her only advantage to winning Naoki's heart!?

Naoki begins thinking about what he wants to do with his life and about the future of the family business. For spring break, Kotoko and Sudou go to Romance Village to be closer to Naoki and Matsumoto. However, the experience isn't as "romantic" as it may seem.

Irie tells his father he does not wish to take over his company, instead he wants to become a doctor. Irie's dad has a heart attack after he hears this. When the company employees come to see Irie senior in hospital, one of them requests a marriage interview with Irie. Irie meets Chris and decides to marry her. Kotoko decides to give up on Irie after she overhears him telling oba-chan that he likes Chris. Kotoko goes on a date with Kin and he officially proposes to her.