Suddenly, Regulus Arcturus finds himself in another world. With no knowledge of the world he is in, he keeps making dumb mistakes and the only thing that can guide him in this unreliable world is a system that lives inside him which happens to be equally unreliable. With that, he is left on his own. Will he be able to forge his own path, and what exactly will be grab onto in this unreliable world? [ Inspired by the 'Harry Potter' series, 'My Vampire System' and 'Re: Living Life in Another World from Zero'. ]