Origin of @ (at) symbol

Notice how Est isn’t behaving the way he usually does. Everyone knows Est is a very calm person , normally, he barely talks, he stays quiet and composed. But here? That calm is gone. With Joong there and plus in front of him, Est clearly doesn’t know how to act. He does everything possible to avoid eye contact. Meanwhile, Jung does the opposite, he looks. On purpose.( Joong Est read and see my posts, because of this behavior, they saw our videos about how they can’t help themselves to look at ea