Until Dawn Crossover

All is fine when Matt and Samuel Holt go on a hunting trip with Matt's friend Takashi Shirogane, but it soon takes a turn for the worst when Matt and Samuel both disappear under suspicious circumstances. Shiro goes in search of them but is nearly killed. Down an arm, traumatized and alone, Shiro makes it off the mountain. A year later, Shiro returns to the mountain with friends in search of Matt and Samuel, but they're in for an even bigger surprise.