A giant girl attacking the beach.

A giant girl wearing a summer dress arrives stomping on the beach.

The tallest normal humans only barely reach her knees.

From under there you can see up her dress and see the skimpy bikini she is wearing underneath.

"Tremble in fear before Giantina. I will rule this world puny earthlings. " said the giantess.

Well the earthling remark at least explains the pair of thin antennas ended in bright red balls that are sticking from her hair, she must be one of those extraterrestrial or Interdimensional beings that often pop up around here.

It looks like a job for the Amazing Stallion.

You get away from the crowd using the general distraction as cover and dive into the waves before neighing under water.

Soon in a water explosion the tall and muscular, horse headed hero is standing to face this invader from outer space.

You notice that you are holding the gun you picked up from your fight against the Revealer. As you look at it you notice that besides the stripping function it also displays a dial for arousal. This trophy once you prove that it can be used for good rather than mischief will be a nice accessory to your hero panoply. (at this time just the horse head.)

"Back away Giantina, this world is protected. The Amazing Stallion is there to stop you. Go home or prepare to taste the seed of justice! " you declare.

It is more boasting than real threat as you are still figuring out how to fucked into submission something that bigger than you are.

The alien, perfectly human looking if you except the antennas is very sexy and sporting gigantic boobs. If you manage to jump that high they would provide you a platform to stand on as you try to make her swallow some of your cum. Given her size one load won't be enough and you will have to do it again and again.

Or you could blast away her dress and panties with the gun and try to literally jump inside her pussy to cum in her from the inside.

Or maybe start by making her fall on the ground and either tie her up with straps of her clothes or bury her in sand.