After receiving a mysterious note, Tomohisa makes his way to a secluded meeting with the captivating senior Mizuho, whose attention has drawn him in from afar. The memory lingers the following day, stirring unease when he notices his friend Endou and classmate Mikura, the girl he secretly admires, have both disappeared from view. His worries mount as he imagines what they might be sharing, unaware they have slipped away to the fire escape for a private encounter of their own.