Tsukishima and you were secretly dating, and as you were the manager of the Karasuno volleyball club, the two of you would almost always arrive earlier than everyone else to make out in the small room on the gym. You stayed there because no one usually used that small room.

Today you two were there like every other day, making out in that small room. Tsukishima had his back to the door while he kissed you, grabbing your waist and hips, until while you were kissing, you felt the small room light up, followed by someone completely shocked saying "Oh my god."

It turns out that the two of you had lost track of time, and it was already time for practice, and all the other team members were already on the gym.