I looked into it and it seems this is a manga original rather than an adaption. I could be wrong but that's what it seems based on looking at the official raw site.
What I don't get is why they don't get a flipping knife sense to help them when they inevitably get into these situations. Like, they are a solo player, expecting to always be able to stay at range from your enemies is crazy, especially when it only costs you on sp to get a sense that will give...