"Declaration of War!" (宣戦布告！,Sensen fukoku!) is the first episode of the anime adaptation of Boys Over Flowers. It aired for the first time on September 8, 1996. This episode was also directed by the series directer, Shigeyasu Yamauchi.
A group of four handsome, rich boys known as the F4 control the student population of Eitoku Academy. Tsukushi Makino is no longer content with staying on the side lines and challenges their rule.
Tsukushi Makino, a poor student, sighs as she listens to her classmates at Eitoku Academy talk of extravagance. She silently continues sweeping and runs into her friend, Makiko Endo. They witness Tsukasa Domyoji, the leader of the F4, a tyrannical clique at Eitoku, bully another student. The F4 moves on and knocks over a wastebasket that Rui Hanazawa, the clique's mysterious member, picks up.
The same day, Makiko asks Tsukushi if they are friends. Tsukushi readily agrees and they make plans to go somewhere. Unfortunately, Makiko trips down the stairs and lands on Tsukasa. Obviously angry, Tsukasa appears as if he may blow up, even after Makiko apologizes. Tsukushi stands up for her friend and yells at Tsukasa, quickly realizing her mistake.
After school, Tsukushi meets up with her best friend, Yuki Matsuoka. She talks about all her troubles at Eitoku, though Yuki does not seem surprised by Tsukushi's actions. As she listens to Yuki talk, Tsukushi starts to believe she did the right thing. Yuki gives Tsukushi an "emotion detector" toy and together they go to work.
The following day, Tsukushi receives a the F4's red card in her locker. This is a cue for the other students to start bullying Tsukushi. First by throwing eggs at her and then taking her desk, while Makiko does nothing. Tsukushi runs from the classroom to a stairwell and yells out her frustrations about the F4. Rui Hanazawa happens to be there and they start to talk. Tsukushi goes back to the classroom and finds that Makiko returned her desk.
A group of students attempt to assault Tsukushi on her way home. Just as they grab her, Rui stops them and saves Tsukushi. Tsukushi goes back to school the next day prepared for all the bullying tactics. Tsukushi declares war on the F4 by kicking Tsukasa in the face and giving him a red card. Tsukasa in a daze, seems to be reminded of his sister.