I love when a manga can use realistic reactions and make it have that feeling of something more, Kirishima approach here is really the only one that makes sense with how things are but you still feel that something more with him skulking around... i mean he is in his element, as a stalker there is no better skulker.
Now, what will Yoshino do, because i doubt the queen will just stay out of sight and wait.
One more thing, rip Yoshino skirt, it really seemed like an expensive skirt.