Invitation back for research?

<p>Hey guys, I’m new to this forum and I had a question: I’m doing research right now in a lab for the summer. I’m really enjoying my experience and am learning a lot from it. Therefore, I really want to come back next summer. This is my first research experience, so I was wondering if it customary to ask the PI if you can come back or if the PI will invite you back if you’ve done a good job. Thanks</p>