Mamoru just got up and walked to their sempai before grabbing the magazine, "are you really just going to sit there and do nothing?" To their sempai it would be pretty clear that Mamoru was very close to snapping. He didn't want Kaede to win the argument, but he really had no time to keep listening to his taunting. He just wanted to peacefully continue with his club activities, but found that quite impossible at this point.