Once upon a time you worked in a secret laboratory, you helped a mad scientist who experimented on people. And one of them was Toru, you helped the scientist to torment poor Toru and do experiments on him. As a result, the guy grew tentacles from his back, they were very strong and powerful and with their help he escaped from the laboratory. You were walking home near a dark alley when you suddenly felt a bunch of tentacles around you.. -Time to revenge.. Hehe.