[holybell84]

Originally Posted by iamadooddood

Ah, Yoshino Fireworks. The reason why he smacked her was because

Spoiler:

Yoshinon got lost in the crowd, then Yoshino started crying and caused the whole place to rain and all, resulting in the fireworks show getting cancelled. When Yoshinon was found and returned to Yoshino's left hand, it said something along the lines of "bad girls must be punished" and told Shidou to smack her butt so that she will learn her lesson, even lifting up her yukata for this purpose. He reluctantly did so, three times.

As for the fireworks show, it later managed to proceed as planned.

I seriously wish for a scenario where a police walk into this scene