Kawaki's Cover Blown?!

Kawaki and Himawari’s class will be putting on a play about the Legendary Sannin for the school festival. The students rehearse wearing prop headbands, but when Eiki discovers that Kawaki brought a real headband, he tries to expose Kawaki’s true identity to drive a wedge between him and Kae. Kawaki can’t afford to let Kae find out about his mission. Will he be able to prevent this from happening?!