Kae has been taken away and Kawaki must face a dangerous assassin. Himawari acts as his partner and provides support during the battle. They try to corner the enemy with coordinated attacks, but the enemy proves to be powerful. Meanwhile, their classmates, who had entrusted Kawaki and Himawari to directly confront the assassin, take action in a desire to try to help. Will Kawaki be able to save his precious friends and accomplish his mission?

Now then, I'll end this for you!
!والآن، سأنهي هذا الأمر
Gut! Nun setze ich euch ein Ende!
Acabaré con esto.
Voy a acabar con esto.
Avanti,
Certo, vou acabar com isso!
Ну что ж…
сейчас я положу бою конец!