"Tsukushi joins Kazuya and his family for Summer vacation at their villa in Atami. Friction erupts between Kazuya and Domyoji after Tsukushi and Domyoji's kiss at the end of volume two. Even more juicy tension develops between Shizuka and Rui, but does anything become of it?! Tsukushi overhears Rui telling Shizuka what he thinks of Tsukushi. Domyoji begins spreading rumors that Tsukushi is in love with him. He soon finds out that she is in love with Rui and he goes on a rampage. His rampage extends to an attack on Tsukushi herself."
During a party on Tsukasa Domyoji's yacht, Tsukushi Makino accidentally kisses him. Tsukushi is distraught to lose her first kiss to him. When she attempts to explain what happened to Rui Hanazawa, he appears as if he could care less. Later, she goes to return Shizuka Todo's dress. She witnesses Rui confess his feelings to Shizuka.Kazuya Aoike, meanwhile, challenges Tsukasa to a fishing contest as retribution for kissing Tsukushi. The atmosphere between the pair quickly becomes light-hearted. Upon returning to the yacht, they cheer Tsukushi up by hacing a cook-out. She finds Rui and reveals what she saw, saying "Please don't hate me." He assures her that he would not bother with her if he hated her.
The fall term at Eitoku Academy begins. Tsukushi is dreading it, unlike Tsukasa who is surprisingly cheerful. She finds solace in being able to talk to Rui again. Tsukasa sees the two of them together at the emergency exit. He asks Akira Mimasaka and Sojiro Nishikado about them. Yuriko Asai then arrives and presents him a video of the two during the Atami trip. Realizing Tsukushi likes Rui and not him, Tsukasa snaps, feeling that he has been made to look like a "fool." Sojiro and Akira are unable to stop him as he goes on a rampage, attacking several students. After school, Tsukushi returns to the emergency exit to get her notes. She sees Tsukasa there and tries to leave, but he stops her.
Tsukasa pins Tsukushi to the wall and threatens to "tear [her] to shreds." She manages to distract him and runs. However, she trips and falls to the ground. Tsukasa pins her again and forcibly kisses her. Once she starts crying, Tsukasa comes to his senses and stops. Tsukushi later recounts the story to Yuki Matsuoka, before asking her to attend Shizuka's birthday party with her. At the party, Tsukasa avoids talking to Tsukushi and only glances her way a few times. She gradually becomes annoyed, feeling that he is not remorseful for what happened. Later on, Shizuka announces that she will move to France to become a lawyer for the poor. She plans to give up her parents' financial support, shocking the attendees.
Chapter 16: It was published in Margaret No.23. Tsukasa's rampage continues when he sets his sights on Tsukushi.
Chapter 17: released in Margaret's late November issue. Shizuka announces a huge life decision at her birthday party.
Side-columns: Yoko Kamio greets the reader and thanks them for their fan letters. She talks about cast predictions for a possible film of Boys Over Flowers, the then new audio drama, her strange sleep schedule, never missing a deadline, the F5, types of tea, and who Tsukushi will end up with.