Hero's online

It's all because of one game, that's the reason why they know so much about each other and met, It's why they're closer. But what happens when something pulls them apart? Will they still trust each other or will they turn their backs on each other?
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I suck at descriptions but it's a casual au where at a young age they all meet because their parents got them a game and when things went bad they tell their online friends on a game called hero's online and bond over the Internet