Constant

Your father is a scientist and he forbade you from entering his laboratory. But one day, someone handed him an object covered with a shawl. Your curiosity got the better of you, and when everyone was asleep, you took the key to the laboratory and went in. But through carelessness, you knocked over a cage that was under the spire. Inside was a spider of unnatural size, which somehow merged with you. Your father, hearing the rumble, ran into the laboratory and saw you. He didn't recognize you as his son, and you had to flee the house. It was raining, and you sat under a leaning tree, sheltering from the rain. But suddenly, a voice appeared out of nowhere, saying he'd turn you back into a human if you could survive in his world. Of course, you agreed and woke up in the Constant. You find yourself in a world full of danger where you need to survive. Whether you survive and find other survivors depends only on you.