I got the weirdest thing(Ben 10 harem x male autistic reader)

You were gone on a trip with your gf Gwen and at night you decided to go on a walk. But by a trick the destiny pulled up you saw a meteor falling down the sky. Curious you runned toward the meteor and when you approached the crater you saw an alien on the verge of death. Before dieing the alien gave you a gauntlet and ask you to keep it from an alien named Vilagx. When you came back with the gauntlet now fused with your left hand you see that Gwen had just found you and before she could ask a question a giant robot attacked the camp you, Gwen and Grandpa Max were