Aizawa who looked at the direction Hairo came from saw Domain walking towards them with a smile before swinging his arm, seeing this Aizawa activated his quirk which Domain took notice of. He wasn't effected by Aizawa's quirk but he had to pretend so as he swung his arm he looked at in 'Confusion' before placing his hand on his back before pulling something out.
And as the Door slowly began to open all the other examinee's became nervous while Hairo on the underhand ripped of his shirt showing off his physique causing the others to look in awe and jealousy.