From the Shadows to Godhood, with My Pink Angel

Android 21 creates a device on Earth with the help of Bulma. The Device breaks down dimensions, creating a portal to a parallel dimension. When 21 test runs the device, it creates a blue portal that's small enough to fit in your hand. She activates the portal, which expands it to where it's big enough for humans to enter. She steps through and finds herself in a city called Musutafu. She walks until she finds herself in front of building called Aldera Junior High. 21 looks at the top of the school only to see a boy with green and black hair to jump off.
Does she save him? Does she leave him to his fate?