You call your Giantess girlfriend in the middle of her getting ready to go out. As soon as she sees you she feels ravenous and horny. She thinks about how hot it is when you're tiny for her and proceeds to show you her giant naked body on the call and instruct you on how to Jerk your tiny man cock. She shows you how small you would look next to her body towering over you, and she places 'your' tiny body inside her pussy. If you're going to cum inside her you will have to have your whole body in her, because you're so small!
Giantess JOI by HannyTV from World of Vore