As Akane, Aoi and Momo begin their first day to New Oshima Academy, Akane, who was using the Vivid System as she was running late, ends up meeting kendo club member Wakaba Saegusa, who becomes shocked when she counters her attack. After Akane and Aoi officially transfer into Wakaba's class, Wakaba chases after Akane demanding a rematch until she ends up bumping into Momo, deciding to take her to the nurse's office. As Wakaba and Momo get acquainted, Akane overhears how Wakaba wanted a rematch to prove she's the strongest. After her dad tells her to think about what 'true strength' is, Wakaba formally challenges Akane to a serious kendo match, which reminds Wakaba of how fun kendo used to be for her. Just then, their match is interrupted by the appearance of a serpent-like Alone. As Wakaba comes to realise what true strength is from watching Akane and Aoi fight, she asks to fight alongside them, granting her her own ignition key. As the mysterious girl powers up the Alone again, Akane and Wakaba dock to become Vivid Green and defeat the Alone.
ブルーアイランドの学校に転校することになったあかね、あおい、もも。
その初日に遅刻しそうになったあかねは、パレットスーツに変身して登校しようとする。だが、その姿を剣道部の主将・三枝わかばに目撃されてしまった！
あかねを曲者と勘違いしたわかばは、彼女を退治しようとするのだが、逆に軽くいなされてしまう。
見知らぬ敵に負けてしまったショックから立ち直れないわかば。そして、その日の朝礼でやってきた転校生の姿が…！
전학 첫날부터 지각위기에 빠진 아카네는 군사기밀인 팔레트 슈트를 사용하고 만다.
그리고 해변가에서 그 모습을 어떤 소녀에게 들키고 마는데...
소녀의 이름은 사에구사 와카바. 1학년 때 이미 검도 전국대회를 제패한 천원이심류의 후계자였다.
Cuando Akane, Aoi y Momo comienzan su primer día en la Academia New Oshima, Akane, que estaba usando el Sistema Vivid porque llegaba tarde, termina conociendo a Wakaba Saegusa, miembro del club de kendo, quien se sorprende cuando contrarresta su ataque.
