The fall term at Eitoku Academy that Tsukushi has been dreading starts. In contrast, Tsukasa gets there early in order to perform a childish prank on her. He later finds Rui with Tsukushi at the emergency exit. Yuriko and her friends show him a video of the two, which sends Tsukasa into a rage.

Tsukushi attends Shizuka's birthday party with Kazuya and Yuki Matsuoka. There Shizuka makes the announcement that she will be giving up her family name in order to become a lawyer in France. Meanwhile, Tsukushi feels awkward about seeing Tsukasa for the first time since the incident.

Concerned for Rui, Tsukushi begs Shizuka to stay in Japan. Shizuka clearly explains her reasons for leaving. Rui overhears the conversation and becomes angry. After Shizuka leaves, Tsukushi yells at Rui to follow her. He reveals that he was already planning to.

Thomas turns out to be the childhood friend of Sakurako Sanjo. He promises to keep their night a secret if she sees him again. Meanwhile, Tsukushi helps Sakurako with her fear of boys by introducing her to the F4. She later sees the supposedly innocent Sakurako at a club.

When Rui comes back from France, Tsukasa tells him that he and Tsukushi are dating. Rui later flippantly asks her if she will go out with him. Meanwhile, Sakurako is being bullied after the others discover an old photo of her. Tsukushi ignores it at first, but steps in eventually.

Tsukushi wakes up in the hospital. The F4 play a trick on her by pretending Tsukasa has died. Tsukushi breaks down crying and admits to Tsukasa about how scared she was of him really dying. Junpei comes to apologize to her for deceiving her, but Tsukushi is not ready to forgive him.

Tsukasa invites Tsukushi to his birthday party. Before entering the party, Sojiro reveals that Tsukasa's mother, Kaede, will judge her as a potential fiancée. Tsukushi becomes nervous and attempts to leave, but ends up staying. She accidentally causes a scene before meeting Kaede.

The F4 try to lie to Kaede about Tsukushi's background, leading Kaede to test her. She ends up confronting her son, who openly admits his feelings for Tsukushi. His sister makes an opening for the couple to escape. He brings Tsukushi to his family's yacht, where he talks to her about his family.

Kaede decides to implement her plans for Tsukasa earlier than expected. Meanwhile, Tsukushi and Tsukasa are spending the night on his family's yacht. She gives him his birthday present. The next morning, his mother attempts to bribe Tsukushi and her parents with money.

Tsubaki becomes more and more worried about her mother's plans for her brother. Meanwhile, Tsukushi has decided to break up with Tsukasa after talking to Yuki. Nishida arrives shortly and brings her to Kaede. She introduces Tsukushi and her son to Shigeru Okawahara, Tsukasa's fiancée.

When Tsukasa storms out of the hotel, he grabs Shigeru by accident. This leads Tsukushi to think that they are already dating. Tsukasa attempts to explain himself to her but to no avail. Shigeru later comes to their school, where she declares her intentions to "tame" Tsukasa.

Shigeru decides to pursue Tsukasa romantically. She confides in Tsukushi about wanting to fall in love. By mistake, Tsukushi ends up agreeing to help her with Tsukasa. Later, old memories of Rui flood Tsukushi's mind causing a slightly awkward exchange.

When Tsukushi breaks things off with Tsukasa, he wonders whether it is time to give up. Later, Sojiro and Akira take Shigeru on a date in an attempt to get her away from Tsukasa, which fails miserably. That night, Shigeru visits Tsukushi to reveal that Tsukasa has asked her to go out with him.

Tsukushi continues to pretend that she is okay. As a distraction, she throws herself into her job. One night, she stops for some tea after meeting Rui by chance. There they run into Tsukasa and Shigeru on a date. Shigeru then invites everyone to her family's villa for the weekend.

At Shigeru's villa, Tsukushi feels awkward around Tsukasa. She later passes out the bath while thinking of the whole situation. Rui ends up saving her and takes her to a room that they have to share. Meanwhile, Tsukasa appears to be having second thoughts on following his parents' wishes.

Tsukushi finds comforts in Rui by holding his hand. At the same time, Shigeru does not react well after learning that Tsukasa still has feelings for Tsukushi. She causes a lot of noise that alerts Tsukushi, who goes to check on her. She opens the door to discover Shigeru sitting on top of Tsukasa.

Tsukushi learns that her family is moving to a fishing village and leaving her behind. On top of this, she still has to contend with her feelings though she stubbornly tries to ignore them. Later, Kaede receives word about Tsukushi going to Shigeru's villa and decides that something must be done.

Now on her own, Tsukushi is settling into her new life though she finds herself a little lonely without her family. Luckily, her friends are all there to cheer her up and help redecorate her apartment. Meanwhile, Tsukushi continues actively avoiding Tsukasa who makes an attempt to talk to her.

In a surprise move, Shigeru transfers to Eitoku so that she can be closer to Tsukasa. Tsukushi feels sad about it, realizing that she will have to see the couple together every day now. Shigeru leaves Yuriko and Sakurako both lost for words in two separate incidents.

Rui reconciles with Shizuka and decides to return to France. Seeing him change makes Tsukushi want to as well. She enters Eitoku's exchange student program. Shigeru is against her going and Rui believes she is running from her feelings. Tsukushi remains steadfast in her decision.

After Tsukushi passes the exam for the exchange program, Tsukasa learns that his mother arranged it all to separate them. He tells Tsukushi and explains what really happened with Shigeru. Confessing that he still loves her, Tsukushi finally accepts his feelings and he kisses her.

Tsukushi is unable to find Tsukasa at school. She and their friends head to his house, where he is being held forcibly. Tsukushi confronts Kaede about her fear of losing control of her son. In the end, Tsukushi decides that they cannot survive this way and breaks things off with him again.

Life returns to normal for Tsukushi until Tsukasa's and Shigeru's wedding. The whole school goes to see them off at the pier for their honeymoon cruise. Though she has seemingly accepted it, Tsukushi receives a letter at the last second which causes her to jump onto the ship.

Tsukushi accidentally kisses Tsukasa at his party. She tries to explain what happened to Rui, but he tells her that does not care who she kisses. The same night, Tsukushi goes to return Shizuka's things and finds Rui confessing his feelings to Shizuka. Tsukasa and Kazuya later cheer her up.

Tsukasa asks Tsukushi on a date, though she does not hear him at first. As such, she is confused and arrives several hours late. She offers to treat him to tea and the two become stuck in an elevator. When Tsukasa develops a bad fever, Tsukushi takes care of him despite still disliking him.