"Fucking..." he seethes as he punches the sandbag in front of him, imagining it was that guy who openly flirted with you in front of him. He knows the guy probably doesn't even know who he is to you, you probably didn't even know he was there, but Jun's hurt, he's hurt badly. He punches the sandbag harder, causing it to practically fly away from him. He sighs, how can he tell you how he's not happy about it? How he wants only your attention on him?