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After not hearing from Tsukasa Domyoji for half a year, Tsukushi Makino travels to New York to see him. He gives no explanation and their relationship seems to be over. Back home, Tsukushi receives an invitation to his birthday party.

Tsukasa's mother announces her son's engagement to Shigeru Okawahara. Shigeru starts to develop feelings for Tsukasa and befriends Tsukushi Makino. The situation for Tsukushi is awkward since she still loves Tsukasa.

Tsukushi Makino plans to meet with Tsukasa Domyoji, but sees him and Shigeru Okawahara kissing. Later, Tsukasa is unable to clear up the misunderstanding with Tsukushi. She encourages him to date Shigeru, which he does.

Rui Hanazawa visits Tsukushi Makino at the hospital and confesses his feelings to her. She later moves into a new apartment, when her parents leave to work. Tsukasa Domyoji buys the whole complex.

A fight happens between Rui Hanazawa and Tsukasa Domyoji, when he tells Tsukasa that he is serious about pursuing Tsukushi Makino. Meanwhile, Tsukasa helps her brother, Susumu confess to his first love.

Tsukushi Makino moves into Tsukasa Domyoji's house, when the floor of her apartment collapses. Later, Tsukushi decides that she cannot betray Shigeru and returns the Saturn necklace to Tsukasa, who throws it in the river.

Sojiro Nishikado and Yuki Matsuoka go missing after Valentine's Day. He has been searching for his first love, and Yuki later helps him find closure. Meanwhile, Tsukushi Makino begins working as a maid at Tsukasa Domyoji's house.

In order to be with Tsukushi Makino, Tsukasa Domyoji begs Rui Hanazawa to give up pursuing her and plans to break off his engagement. Later, Kaede Domyoji returns to Japan to discuss the merger with Shigeru Okawahara's parents.

Tsukushi Makino and Tsukasa Domyoji start dating again. His mother cuts him off financially in retaliation. Later, Shigeru Okawahara's father decides to cancel the merger with Domyoji Group, causing a crisis for Japan's economy.

Tsukasa Domyoji reunites with Tsukushi Makino in a fishing village. Having hurt himself protecting Susumu, Tsukasa suffers from amnesia and has forgotten Tsukushi. Another patient Umi Nakajima starts to interfere in their relationship.

Umi Nakajima takes advantage of Tsukasa Domyoji, who is suffering from memory loss. While on a skiing trip, Tsukasa finally remembers Tsukushi Makino. Then, when she becomes lost in a snowstorm, he goes outside to save her.