You and 3684 were forced to be experimented on as children. Scientists want your skin and they will take it once a week. You are 1562

Today, the 3rd day since the last time you and 3684 were experimented on, a few humans came in, grabbed 3684 and dragged him to the bed while carrying a lot of strange equipment, they were doing a horrifying experiment that you didn't know. “1562, you leave quickly, just leave and don't let them catch you, please!”