Dave looked at Etha with a serious expression, as well as the girl who was the most feared of all the third year students in this school. Of course Dave did not accept Etha's treatment to Jean, which he considered too much. If it's a cracked phone screen problem, then Dave will compensate for it, even if Etha asks to replace the new phone instead of fixing the screen, then Dave will give it too.
But Dave could not accept that Jean, the girl who was going to be engaged to him was treated so rudely. So that's when Dave won't hold back his anger anymore.
Etha also didn't seem intimidated in the least by the look Dave gave her. Usually, people would feel scared to see Dave's gaze filled with that murderous aura. But not for Etha, the girl even challenged Dave back.